Vodacom no respect for there loyal clients

Vodacom messed my billing system and now they now demanding payments or they will cut my service , I am a client over 16 years and to be treated this way is sad, I have engaged on a number of times with Vodacom and asked question as to how my billing was messed they refuse to answer but keep on asking for proof of payments , I provided all the statements they sent to me , they refuse to take accountability for there mistake but keep on asking me to pay or they will cut my service , what a pathetic service from Vodacom , i even requested they meet with me but they keep on giving excuses, I am sure there are a lot of other people that are being bul**** by Vodacom.