Prepare a website on "Tilda" for launching contextual advertising with Google Shopping.

Good day everyone! We need to launch an advertising campaign for the website bimber.top. Currently, the following bugs have been identified:
1. When entering the cart, the fields for filling out the order do not always appear, and it immediately shows an error https://prnt.sc/hT2XwIVjB8WX
2. Set up online payment with wayforpay. The payment system has approved the site and issued tokens; now we need to correctly configure online payment on the site.
3. Check the correctness of the domain address on all pages of the site; currently, when transitioning to the "Store" section, the following link is displayed https://project45784.tilda.ws/page83930476.html

4. Configure the site for opening the merchant center

Main conditions for passing moderation in Google Merchant Center

Correct site and product pages

Google checks the integrity of the online store. It must be:

• accessible https (SSL)
• all links working
• real content and photos
• product page opens without errors
• the site must be complete, not a "placeholder"

Return policy and delivery terms

It is mandatory to have separate pages on the site with clear conditions:

The site must have:

• Return policy (return policy)
• Shipping terms (shipping policy)
• Payment terms (payment policy)
• Contacts

Google checks if this is visible in the menu and not hidden.

Correct display of prices

The price must:

• be the same in the feed and on the site
• be in the currency of the display country
• reflect all mandatory taxes
• be final, not "from ..."

Product availability = real

The site and the feed must have the same status:

• "In stock"
• "Out of stock"

No fake "in stock" when the product is actually unavailable.

Correct images

Google blocks the feed if the photos:

• contain text over the image
• contain watermarks
• have borders/banners/promotions
• are of poor quality or too small
• stock images do not match the actual product

Correct attributes in the feed (the feed is uploaded for Google Merchant Center)

Mandatory for each product:

• id (unique. That is, each product must have a separate page)
• title
• description
• link
• image_link
• price
• availability
• brand
• gtin or mpn
• google_product_category

Company contacts on the site

On the contact page, there must be:

• physical address (not necessarily a store, but real)
• email or feedback form
• phone
• preferably working hours

Correct payment

Google checks for the presence of:

• real payment methods (including online payment)
• absence of hidden fees
• the ability to pay without registration (for most countries)

Legal page / privacy policy

The site MUST have:

• privacy policy page (privacy policy)
• cookie notification (if analytics is used)

Please provide guidance on costs and timelines.