Failed refund request

Appalling customer service. I got double debited and requested for a refund. I was told the request had been processed and I would receive my refund within 7 to 10 working days. 10 working days later I get told the refund was only processed about a week after requesting it. The following day, another agent tells me a refund was never processed for my account. Online portal states that I will be credited for the following month only for them to change my payment date up a week so I’ll still be paying the following month. An absolute nightmare. Sick and tired of the back and forth.