No respose to complaints !!!

I had a wi-fi contract with Nashua from MTN . On my contract that is in the hands of MTN ( -can listen to recording ) my contract was to be cancelled Jan 2015 , but that's scratch out and 2016 was written in , WITHOUT ANY SIGNATURE NEXT TO IT !!!! I have spoken with Nashua regarding this , but because they have lost the contract with MTN , they was not interested in helping me . <br> I spoke with the owner of Nashua in Nelspruit , Alida Picotto . <br> My main complain is against MTN .At the estate were we are living , we have very strong Wi-fi signals , so I was not using my MTN , but during the December Holidays of 2013 we were in Kruger Park Lodge with our family and I took my wi-fi with . My account was always R 250 ( I think I had it for 4 Years ) then because of the holiday , the account went up to R425 , which is fine because we have used it , BUT THEN from Feb 2013 uptill today 9 Feb 2016 , I am paying R425 !!!!! I have phoned , I have been in 3 branches of MTN NELSPRUIT NUMEROUS TIMES , I have written many complains by email ( which I have proof of ) but they keep on deducting my money !! My complaints Ref ***; Ref ***8 , Ref *** I ( MTN)many more