Not receiving my full rewards for fuel purchases at eBucks

I have started a query with eBucks in Jan 2019, which is unresolved to date of this review. On 27 May 2019, I added to my query when I found that eBucks did not give me my full rewards on fuel purchases since Dec 2018. I drive a lot for business and should therefore easily exceed the R2500 limit each month on which one can earn fuel rewards. Yet I found that I would e.g. only be given rewards on R250 fuel spend in Apr 2019. Now eBucks firstly assumed that I did not keep to the terms and conditions to earn on fuel spend by paying for fuel at the Engen Quickshop, therefore it will be deemed as goods purchased and not fuel. I did however supply them with all my slips, proving that I paid for ALL my purchases at the pump stations and NOT in the Quickshop. My query has taken so long to resolve, that June 2019 now forms part of my query. Further, according to me I feel that the consultant assisting me from eBucks’ side is not able to resolve my query, but I can’t seem to get the contact details of a supervisor or manager. And then, according to the consultant, apparently the one person (?!?) that can resolve my query will only be back at the end of July 2019. This is totally unacceptable. I am expecting an adjustment in the region of eB12,000 but I have only received an adjustment of eB2,564. Finally, I am telling the eBucks consultant that they need to liaise with FNB (Current Acc & Credit Card) to resolve the incorrect classification of fuel purchases, as this seems to be a continuous occurrence.