OpenCart 2.2 - Template errors fix, Google Merchant Center Feed Errors

I am searching for skilled OpenCart developer that can finally help me to resolve all those errors below and fix the site once and for all. I had one developer just updating the Coysone template and after that all problems begun, not right away but a week later. 1. Remove 301 redirect from the site – (currently I have https://.........) – remove https:// and keep http://. It is somewhere in htaccess and opencart admin page. http:// – I like to have that when person enters the site. https:// – when they buy something/check out pages only – SSL so they secured The issue is traffic is slow for months and every SEO test tells me – too many redirects! I have 2 redirects in total and that is why this site is not indexing and traffic is so low. One is only allowed and I have that already .....www. and [login to view URL] – that redirects to the same site. (I have that now and I like to keep it). – ONE REDIRECT ONLY.....IS ALLOWED 2. Fix Ajax filter error on the line 340, 341, 397 (it is from the template that I use Coysone Opencart 2.2). I have an original template (Coysone Opencart 2.2) and if you need code from the original I have it. Something was uploaded not correctly so once uploaded right the errors will go away. The two other ones are uksb on line 11, 15, 22, 26, 33 – I have a UKSB sitemap extension that works with google and google merchant center. I used that sitemap for 2 years and it worked great. Never had any issues, after extension update - I see those errors. 2017-04-04 5:00:52 - PHP Warning: Division by zero in /home/kingasho/public_html/catalog/controller/module/[login to view URL] on line 397 2017-04-04 11:40:14 - PHP Notice: Undefined index: min_price in /home/kingasho/public_html/catalog/controller/module/[login to view URL] on line 340 2017-04-04 11:40:14 - PHP Notice: Undefined index: max_price in /home/kingasho/public_html/catalog/controller/module/[login to view URL] on line 341 2017-04-04 15:24:02 - PHP Notice: Undefined index: path in /home/kingasho/public_html/vqmod/vqcache/[login to view URL] on line 505 2017-04-04 20:53:06 - PHP Notice: Undefined variable: password in /home/kingasho/public_html/vqmod/vqcache/[login to view URL] on line 77 2017-04-04 20:53:11 - PHP Warning: Cannot modify header information - headers already sent by (output started at /home/kingasho/public_html/catalog/controller/startup/[login to view URL]) in /home/kingasho/public_html/vqmod/vqcache/[login to view URL] on line 12 2017-04-04 21:09:21 - PHP Notice: Undefined index: store in /home/kingasho/public_html/catalog/controller/feed/[login to view URL] on line 22 2017-04-04 21:09:21 - PHP Notice: Undefined index: store in /home/kingasho/public_html/catalog/controller/feed/[login to view URL] on line 26 2017-04-04 21:09:21 - PHP Notice: Undefined index: store in /home/kingasho/public_html/catalog/controller/feed/[login to view URL] on line 33 3. In google merchant center – I get error as well because of that ajax error above. The feed does not update price, product availability. Never seen that before since it walks worked well for years. Basically the problems started after last developer have uploaded the upgrade of Opencart 2.2 Coysone template (newest upgrade). After upgrade and he changed the name of the database (have no clue why he did that) problems started. My php databse was named as kingasho_kids and he changed to kingasho_oscar465. If that is causing the errors then I like to rename it to what it was before the change. 4. I also like to get some improvement if possible on the errors below....if possible. Not sure if that is a template or something is not set in the server, I asked my host and he says it is the site, template? - add expired headers - cookie free domains - make few https requests