Mtn bad customer service

I took out a data contract over the fone in April 2023 for 30G anytime data and 30G night, it is now July. Since April i have only received 10G anytime data and 10G night data and im paying every month. I have been contacting Mtn ever since the first data came on my fone and evertime i get a new reference. According to there system everything is right but im just not receiving all my data. Mtn customer service is very bad because it seems like they can't help me, i don't know what to do anymore.