Bad After service

I would have given no stars if there was an option for that. Did a upgrade and sim swap, service in store was brilliant, but NO after service. The sim swap took 10 days to go trough, please note, after we had to contact head office and lay a complaint, then my mom was suppose to get 30GB of free data valid for 30 days. The manager the promised us that she would try to get the data extended, as we lost 10 days. Then after the 10 days that my mom was finally able to use the sim card and the phone, we noticed that the only received 25GB!! ... Well Done MTN N1 City, you over done yourself. Oh, I almost forgot, its like their telephone is not working, everytime you call the number provided by Google, no-one answer the phone....