Poor Service

I entered into a Black Friday data contract last November. It was marketed as 60g day and 60g night (40 + 40 +40). from inception the full data has not been allocated. I raised it 3 times via the store to to avail, the store eventually suggested I raise it with Complaints Managements which I did in May, to date all I am hearing management (Mike was looking into it. This month on 27 August should have received 60g day date , received only 40g yet MTN is debiting me the full subscription.