Risky! Tested unit, need battery replacement and BEAME has not assisted.

What a mission to get help from Mix Telematics! Tested my BEAME unit. Got a response that my battery needs replacement. Informed Mix Telematics via email twice (after getting a case no.)with the same case number. Nobody from the company contacted me. Decided to call in, waited a while as i was put on hold. Eventually got hold of a customer care person, requested a call back and they said they cant call back. They said cause I am cancelling my contract end of July they will need to check if I should replace my battery and will let me know. I am still waiting.....What if something happens to my car in the meantime? Mix Telematics....is there something more I can do to follow this up? Did I miss something? Day 3 and I am still waiting. PLEASE HELP!!!!