Bad service

I have been a Vodacom client for probably 14 years, I have mostly received great service over the years - HOWEVER, I have received no assistance and the worse service with a data problem experiencing since 28/12/2015.<br> ? On the 28th I received a sms that my general data has run out. Using *111# I bought top up (30 days) - 250 MB data. <br> ? I then received a sms stating that my Vodacom GPRS Service has been migrated to 250 MB MI Month to Month Contract? WHAT IS THIS? I do not want to alter my existing data bundle or package/ contract, I just want additional general data.<br> ? On the 29th I receive another sms stating my general data has run out??? <br> Herein lies the problem - I have tried email, live chat, mobi, calls, etc. to Vodacom and cannot get a satisfactory answer.<br>