In March I did an up...

In March I did an upgrade on my data subscription...which was 400GB and suddenly went to 300GB without any communication...when I complained I was told it was initially like that from the start but I was getting 400GB from the start. So this guy Philasande made me sign up for 400GB for R400 said it's a promotion...when my data was loaded I received 300GB I complained from that day up until now it's not sorted...even the manager can't come with anything concrete. Today is 27 May and I received 222.00GB that is less than 300GB...there's no way from midnight that my phone can use 78GB while was sleeping. What kinda joke is MTN taking me for