Finalization of the site on OpenCart

It is necessary to make the following improvements on the kroshka-antoshka.ru website on the OpenCart system:

1. Now the catalog loads slowly, hangs, often gets a 504 error. In the TP hosting they write that you need to optimize the database.
2. The catalog on the site is updated by updating the CSV file on the site, which is uploaded to FTP from 1C.
Along with it, categories of goods are loaded, we need to hide non-relevant ones, so that only relevant ones are on the site, you may need to finalize the upload.
3. In Surgut, when sending, an error comes out prnt.sc/26ifgjf
4. When you select Pickup, the comment window moves out and pays prnt.sc/26c24mu

Point 1 is quite critical, you need to perform until Wednesday, 09.02, inclusive.

Conditions:
1. Experience with OpenCart and its integration with 1C
2. Payment via Secure Transaction on the fl.ru, the commission is paid by us
3. Chat via fl
2 and 3 forced measures due to the fact that they have faced more than once more than once not conscientious work.

Offer on the price expected from you.
We would like to find a conscientious specialist for long-term work, there are a lot of them, the site needs constant development.