Receive phone calls (with the api of Twilio, or Vonage, Telnyx, etc) for payment and the clients Pay with with Stripe or Paypal online

Receive phone calls (with the api of Twilio, or Vonage, Telnyx, etc) for payment and the clients Pay with with Stripe or Paypal online to call at these virtual italian phone numbers Hello! I just need to set up a buy-form (to insert into a wordpress webpage) that permits me to pay in advance some credit to call some Italian phone numbers (landline or mobile is not important, the cheapest would be the best.. so for example a virtual italian phone number that cost 3 euro monthly, is better of a number that cost 30 euro monthly, also because I will need to configure multiple numbers, at least 4-5 and in future maybe more.. ) and the callers has to pay in advance (with paypal or stripe) the minutes to can call. When pre-paid the credit ends, then the phone call ends too or the credit would Self Recharge. PS. The callers are calling normally, from them italian mobile phone number or italian landline phone number. On the other side, the people that are answering the phone calls of the clients, are using a voip number (we still have to choose if we use Twilio or Vonage or Telnyx or other...). Twilio Italian phone numbers (they sell only mobile italian phone numbers ) cost 30 usd monthly and I need to set up 5 and more phone numbers and it would cost a lot, so I would suggest using an alternative service supplier if possible. Attached a demo of the payment form.