MyMTN app payment issues

I’ve upgraded my contract and the first month without getting an invoice as usual (with my previous contract) i got suspended for not making payment.I decided to pay inside the branch.then I decided to use the MyMTN app to make things easier for me .I paid but still got suspended again.when I enquired at the branch I’m told the payment doesn’t reflect in their system .So are we being ****med by MyMTN app?where did the money go to???I have an automated email from mtn acknowledging the payment but still not reflecting on their side.I need an answer as to where my money went to .