False advertising and misleading customers. Horrible service provided

I took a contract with mtn in 2018 i was never credited with the correct package until in may 2019. I asked to be compensated for the data that i never received. I was given 10GB and airtime, i told them it is not worth of what i have lost. We reached an agreement that i will be credited with 10GB for the next 3 months on the 22nd. To my surprise i was credited with 5GB only. Am not a happy client when it comes to Mtn South Africa they deceive customers