120Days battling to get account sorted out

I DON'T KNOW WHAT TO DO ANYMORE.. I EVEN SENT AN EMAIL TO THE CEO'S OFFICE BUT IT STILL NO JOY. I ALWAYS PAY ON TIME AND NEVER HAVE PROBLEMS UNITTTTIIILLL I UPGRADE MY WIFI. THE WIFI WASSSS R329 BUT WAS REDUCED TO R159 ON THEIR SPECIALS AND I SIGNED A CONTRACT FOR THE AMOUNT OF R159. Vodacom KEEP on charging me R329 and I even sent them the contract... Agggg they just ignore this.. Is the. People in the accounts department so unequipt to do their job. I'm sure they can read a contract. I feel like take all my Vodacom accessories and give it in at the first vodacom shop. I will pay R2000 but NOT the extra money they charged me. I'm sick and tired of Vodacom and even warn the people on my fb not to make use of Vodacom.. I tried now 5months to get this sorted out.... No success.. I don't know what to do anymore.. If even the CEO's office cant sort this out?????? Please people dont make use if Vodacom.. They can't even sort out this small problem.. Just charged me what your contract said and what I signed for.. Is that so difficult.....