Pathetic company

I cancelled my telkom services on 5 Oct to be effective on 5 Nov. It is now 5 months later and I'm still battling. First I battled for 3 months to cancel it correctly and now they still owe me money they "stole" via debit order because of their incompetence. I phone in every month begging for my money and all I get is false promises. Should I go yo a lawyer?