Please stop buying airtime on standard bank apps

I used standard bank app to load airtime &entered my MTN No. ***,amount R100. I thot I'd chosen the correct service provider MTN but for some reason Cell C was chosen by default. My credit card was debited with R100 but since my number is an MTN one no credit was given on my number.I'd thot naturally th system will pick this anormally &automatically refund me. I called my bank who advised that Cell C had already banked my R100. Followed up with Cell C, who advised that Standard bank buys wholesale airtime from Cell C and sells to customers so if the money was deducted and not loaded onto any other number they should refund me.The T&C's only apply wen I erroneously load some1's number.Even if it was my fault how do u justify banking my cash and with no corresponding airtime voucher? If u do an audit how do u justify an income where there's no corresponding service rendered?If I'd entered a wrong cell c number and by chance recharged a cell c number for a magogo in Eastern cape I would feel grateful it was her early Xmas present, NOT when the bank takes my cash without airtime voucher released to any1. They have already reported this in their profits, for what service really?