MTN APPALLING SERVICE!!

I took up a 50GB black friday deal with MTN in 2017. the deal was 30GB anytime 20GB night data for R299 per month. to date not a single month has gone by without mtn messing something up. I have never received the correct data allocation in a month, yet MTN has no problem collecting the debit order from my account. I either dont get the full 30GB or by night data does not deplete between 12midnight and 6am, usage comes of my anytime bundle. I took up this package at your Woodmead store and have been dealing with Craig Kimu there. I have called in or visited the store numerous times over the past 4 months and nothing ever gets resolved. last month i complained that I did not get my full allocation and nothing ws done. i asked for an itemised bill to show me how much data I had used but was given **** feedback from Craig and whoever else at MTN. I was provided with in incomprehensible extract of my apparent data usage. so its now 4 months since I have had the data sim. MTN has collected the debit order from me every month, but has never given me the product I am paying for neither have they provided me any compensation for this. I demand that I receive all data that I have paid for but mtn has not bothered to allocate to me, I demand additional compensation for wasting my time for 4 month or just refund be everything I have paid so far and take your ****** sim back. HOW MANY OTHER MTN CUSTOMERS IS MTN ***********? THEY ARE PAYING THEIR DEBIT ORDER BY MTN IS ROBBING CUSTOMERS BY NOT ALLOCATING THE FULL BUNDLE. DOES MTN THINK CUSTOMER DONT CHECK THEIR DATA SIM BALANCES????? *****S!!!