Overcharged and then ignored

After moving area, I decided to move to another armed response. I cancelled the contract and everything seemed to be running smoothly. I had chatted with someone working at Savika via whatsapp to arrange for the transmitter to be taken out. I was always responded to immediately. When I told him that I had continued to be charged for Savika, I was told this would be addressed. Literally weeks later and no update so I contacted him again. From that point he has read all of my messages but chosen to ignore them, I have phoned the customer care line and get told I will be phoned back shortly and never get a call back. So obviously I guess I won't be getting this money back and definitely won't be using Savika's poor service again. Very disappointing indeed.