Twilio deleted our account, phone numbers and thousands of audio recordings after we sent them a request to port a single number to a different account. Support admitted it was a mistake on their end but insisted there was nothing they could do except have us open a new account, and they could try and restore any unreleased numbers back.

All data was lost, number ID's, account ID's all completely different. It took us a LOT of dev hours to update everything, whilst losing some of our customers. Twilio is cheap, fun and dev friendly until they mess up, then you're on your own.