MTN RECHARGE DATA

I bought 1 gig data for my MTN number ********** 775 on the 24th nov 2018 and recharged at around pass 17:00 pm, before recharging my phone had airtime left and my mobile data was off. After my recharge I opened my mobile data the only active App was Whatsapp as I always use Whatsap, however after 10 minutes I received an sms notification saying I'm left with 7,57MB of data, then i called MTN customer care to understand what is going on with my data as this was not the first time having this issue. I spoke to a team leader who was not helpfull, he was telling me that my data was taken by internet of which he was not able to give or provide the app's that were open beside whatsapp, he then logged a ticket ( 1- ********** 4710) and he said the resolution will remain the same and on Sunday he will be off to provide solution. To me that was not good enough as I asked him that on the discription he should inform whoever that will be assigned with my ticket to call me and explain to me what is the issue with data that I loaded. The funny part is that the same team leader called me on monday the 26 to give me resolution of my escalation while he was the one that was logging a ticket, I told him that I don't want to speak to him but department delegate that was resolving my issue/query. I'm still awaiting communication from them. I'm not a happy customer right now and I want my data loaded to my phone. The same 1gig data used to last me a full month but now less than 15 minutes.