It is necessary to integrate the Dostavista delivery service into the site through the API

On the site of https://rentiki.ru/ it is necessary to integrate the delivery service of Dostavista https://dostavista.ru/integrations. The site itself is made through Tilda, we specified - such integration is possible.

The Rentiki service allows people to take childrens goods (strollers, car seats, etc.) for short-term and long-term rent. For the collection of goods, we have several delivery options:
1. Delivery / return the next day and further within the Moscow Ring Road (500₽ one way)
2. Pickup (free of charge)
Optional:
1. Express delivery/return is delivery on the day of order (500₽ to normal)
2. Delivery /return outside the Moscow Ring Road within 30 km from the Moscow Ring Road (500₽ to the usual one way)

Now, when making a payment, the client simply chooses one of the delivery options and options as needed, then we manually place an order through Dotavistas personal account. We most often agree on a 4-hour interval for delivery, as it is the most optimal and profitable for us, but if urgent delivery is required - we look at other more optimal options for the client. Now, depending on the type and options of delivery, the cost price varies from 400₽ to 600₽ within the Moscow Ring Road and from 1100₽ to 1400₽ outside the Moscow Ring Road (30 km).

All information should also be uploaded to AmoCRM, since our CRM system is maintained in Amo. All shipping information. The deal is already being downloaded.

We want the customer to be able to appoint a courier during the ordering process and pay for it at the specified rate. But if there is such a technical possibility, then we would like to add 100-150₽ to the cost of the courier to increase the income from the transaction.