vodacom accounts

<p>On the 19 April 2016 i phoned Vodacom to get a settlement letter for my contract, on the 25 April 2016 i paid up my contract and i moved to another service provider i did e-mailed them the proof of payment and got a letter that they received it . 10 October 2016 i got a letter from Vodacom that states i need to pay them R476.86. when i phoned them and tried to explain that i dont have an account with them anymore , i remembered way i left them in the first place. the Guy at the other side of the phone can’t help me and cut me off trying to pass me on to someone ells, you just can't get to the accounts department </p>