Worst service ever by SAGE Payroll

After 6 phone calls from their collections department, each time i explain that the company that they are looking for has nothing to do with me. I even give them my account number to show that it is different. On each call I ask them to change their details on their system but at this point they put the phone down. Furthermore, they claim that I owe them R 141 even though I have sent e-mails explaining that I did not use their payroll software for this period. Again, I have sent many e-mails and they all go unanswered. SAGE is officially the worst company I have ever dealt with.