loss of data

I have never been disgusted with mtn they way I am now I have had issues with data lately data getting chowed without being used I have done everything they told me to switch off my application running from the background im using sony xperia x1a ultra every 21st I get 200 minutes,200 sms and 500 mb I woke this morning to check my balance the data all gone I didn't even log to the internet let alone used it so I want it back . I don't care what were the reasons behind 500 mb cannot be chowed In spilt of a second I spoke to 3 agents this morning first guy couldn't help he ran away and transferred me to Itumeleng Monareng who also confirmed it hasn't been updated on her side and will log a call and I made the 3rd call I spoke to a lady who told me she had escalated ref number ********** 68127 im fed everything that has to do with mtn service extremely awful as im writing this email im considering options moving my contract else where or cancel my contract with mtn and end my relationship with you i don't care what the outcome will be i just need my refund back