Selection according to requirements. CMS for an online store?

Question

CMS

Good day!
You need to choose a CMS for IM, on which you can organize the following as simply as possible:
1) Different prices depending on the user's city.
2) Different prices for wholesale and retail buyers.
3) System of referrals and discounts on promo codes.
Now there is a site on joomlashop 2.5, but they say that this cannot be done on it. Therefore, a redesign is planned.
And another question along the way. Why don't order and registration scripts always work?
Thanks in advance for your reply.

Answer 1

opencart

Answer 2

(OpenCart / CS-Cart / Bitrix) + finishing with a file for the task.

Answer 3

Bitrix