Poor experience at Engen

Me and my husband went to pour in petrol this morning at Khayelitsha Engen. I informed the petrol attendant that I will be paying with an YuTu voucher. The attendant was unclear and I showed him the app. He then proceeded to say that it will be fine. After he was done filling the car, he could not proceed with the payment. We went inside and the manger said that they do not take Yutu vouchers. I informed her that I've paid with it before. She refused to listen or ask for assistance. The staff was not interested in helping or finding out about the Yutu voucher. I ended up having to make other means to pay. The experience was horrible.