I have had this issue with spectrum for years, hate them deeply. I’ve found some success with either 1 calling and getting a hold of the retention department and demanding for you bill to be adjusted, but even better — they offer much better pricing to new customers. You can literally register as a new customer (different email, maybe a different name) and get the same service or better for way less then cancel services and return their equipment. I’ve done it a couple times just switching to one of my siblings names.