Incorrect Ebucks Allocation

I would like to know how does Ebucks know how much a person has spend on their account for the month, because I've been ****** on my Petrol spend since last year. What I see on my Ebucks statement for my Petrol is incorrect and I've brought it to their attention several times. Nobody bothers to come back to me. They also don't know how to calculate percentages, when I've called them to ask how they came to that amount, the lady who I spoke to also didn't know how to calculate it. I was so stunned!! This month I've noticed that they didn't give me points for having a Will with FNB and noticed that it has been for the past 2 months, maybe it has been for a longer period. "Just never noticed." I've now lost out on being upgraded to a higher level. The ebucks for this month (May) was once again incorrectly allocated for my Petrol and the money spend for the in store spending. Last year they've limited my Petrol spend and only allocated to me for a certain amount spend, which was never the case. When I call FNB I'm being told that they're not the ones giving the figures through and when I call Ebucks they say FNB give the figures through to them like that. Please clarify