Poor customer service

I have recently renewed 1 of my 3 mtn contracts. In keeping with this upgrade for my huawei p20mate pro mtn has advertised a 14gb free pass and once off data of 20 gb valid for 30 days. After repeated lodging of complaints from the store i took the contract out with and speaking to the most unhelpful mtn customer care person from the mtn call centre i still do not have my data 7 days later as advertised. In my conversation with the mtn customer care person i requested to speak to her supervisor because she did not know how things work and i had to explain to her what was happening, she had told me after making me wait for 5 mins that the supervisor is busy and this supervisor will call me back in 10 mins, a day later and still no call and still no data. I fail to undertstabd how an instituition like mtn can fail to load the promised data on a contract as soom as it is taken. Absolutely poor customer service from mtn that i have to run after them to fulfill the obligation of their contract timeously but they take the money from my account rest assured on time. Pathetic! Furious!