Online payment and delivery to simpla cms

Good afternoon, there is not a large online store on simpla cms. We want to add to it the possibility of payment online (Sberbank), the contract was concluded and there are test accesses. You need to create a test page of the basket and add Sberbank acquiring (test environment) to it and test using sberbank test cards. You also need to add the ability to select delivery (SDEK or boxberry) with the delivery service of the contract yet.

In general, the TK looks like this:

1. add acquiring of sberbank (there should also be a function of payment in cash upon receipt)

2. Add the ability to select delivery