Payment integration of the website

I have a one-page landing site on Tilda, working with the payment system Stripe. The site has been operational for several months, featuring only one product (sales of a cold audience course through targeted advertising).

The task is as follows:

1. It is necessary to create a cart on the site with the ability to enter discount promo codes. The product remains the same, but during the order, the customer is given the opportunity to receive additional cheap products at a discount. Here is an example:

2. Solve the problem that when redirected to the Stripe payment page, it automatically offers the card payment method, where the bank card details need to be entered. We do not need this - it scares away customers. It is necessary (most likely through code) to remove the visibility of the card as a payment method, while leaving all other options.

3. After successful payment, the customer is redirected to a thank you page, where they automatically gain access to the Telegram bot with the product (the bot on SendPulse). It is necessary to ensure that for those individuals who filled out the form on the site (email and phone number) but did not complete the payment, a reminder is automatically sent to their email or phone about the need to complete it.

4. Create a simple CRM system.

We are waiting for your proposals, counting on long-term cooperation. We are looking only for people with experience and a reasonable budget for such work.