Charging for a 50 gig But only supplying 20Gigs.

Been with telkom ADSL services since 2011.. Last year september was up upgraded to a 50Gig soft cap line but was explained that there would have been a 20gig day and 20gig night. But been billed for a 50 gig softscape since september. <br> We had some compensation of a Whopping R1117.00. were we've topped it up with R100 for 10 Gigs every month.<br> We have been struggling to get this sorted and have been glued to the phone month after month trying to resolve the problem. we've been to store a half dozen times.<br> With all done to the book its enough and think its time for it t get sorted.Also line speed is only 5.4 megs were were paying for a 10meg fastest line. <br> Also line speed never improves. So please could someone get back to me A.S.A.P please. thanks and regards