Wheelwiz review for Aircall

We tried using Aircall for 1 week after switching to it from a competitor. It was missing plenty of features that should have been mentioned to us. After reaching out to them for support, we received no answer after 5 business days. We tried to cancel our contract amicably, but Aircall chose to answer with the following: "We understand your concerns and reasoning behind your decision. As you are allowed to cancel the service and port your number out of Aircall, unfortunately we cannot offer a refund on this. The reason behind this is an upfront annual agreement was signed and paid for. I will be happy to process your cancellation now." I'm very disappointed with their level of service and them hiding behind a contract, all while not providing an adequate level of service.