Disappearance of Data

After numerous phone calls with Vodacom about my data just disappearing i have had no help regarding this matter , no feedback with this , all that happens is a fault will be logged and a technician will phone you , no Technician phones me and above that i must keep phoning vodacom with my airtime the whole time cause no one phones me back about this problem , on the 1/10/2017 my account was loaded with 3 G i didn't use data yesterday and today at 11 pm 3G data gone , the service im getting from Vodacom is appalling i cannot believe this is the service they strive to with their customer's problems , as soon as my contract with Vodacom finishes i will definitely not be renewing it again!!!