Vodacom contract

I'm so heart broken, no you guys have poor service honestly. What happened to value for money? I have 80GB monthly contract with Vodacom, during December I got allocated 60GB instead of 80GB and I've raised the issue with no success. I've been calling Vodacom like a mad woman to reimburse me, their consultants have been saying that they are escalating the matter.!! Everyday?? How long does escalation take? 4 months? No feedback, nothing! Every time you call they have forgotten about your case!! Your service is poor