MIX telematics (Beame) are useless

Received an appalling service from these clowns. Contacted them in June to cancel their services. Was told my last debit order would be July. Fine. I sent through a cancelation email to the cancellations dept yet in August my account was debited and now again in September. I have raised a dispute with my bank but regardless of several emails to this useless company I have recieve no call or email. Each time I call they keep me on hold for so long (currently 23 minutes) the call eventually drops. I then call back and they put me through to the 'correct' dept where that phone rings until the call is dropped. Obviously they're doing it on purpose to avoid speaking to disgruntled clients.