I would like to vouch for this service which I already use from time to time.
They offer different packages with varying prices and quality, which is extremely cheap compared to expensive competitors.

One disadvantage however is CoinPayments. Maybe, can you take a look at other payment processors to integrate with? For my service, I use CryptAPI / Blockbee, of course there are alternatives to CoinPayments, such as CCPayments (https://ccpayment.com/)