eBucks Issues including not being able to read a calendar

I have the following issues with eBucks: 1) I tried to purchase an item on the Weekly Special via the FNB Banking App on Sunday 18 August 2019 at about 14:00 and it failed 4 times throughout the day. I have all the screenshots and FNB eBucks must keep to the discounted price of the item, because the issue was on their side as confirmed by my chat with the banker via Secure Chat. He said it was caused by system maintenance. I first logged a call to the info email and the first answer from Moshe Langa was that there is a purchase limit of eB50000. I strongly disagreed with this with the reasons explained to him. He then rep**** that I tried to purchase the item on Saturday and that I could have phoned the call centre on the Saturday until 16:00 and Sunday until 13:00, but I tried to purchase it on the Sunday as per my screenshots submitted to him. I also tried to phone on Sunday, but the call centre closed at 13:00. I also have a voice recording for this. 2) I purchased wood for R98 at a Total garage and FNB penalised me for not refuelling my car at an Engen.

I first went through the normal channels, but the people do not even know the difference between a Saturday and Sunday.