I have to pay for call centres bad instructions

I tried loading airtime to my account yesterday, I received and sms stating it was unsuccessful due to technical errors. I called the help line and was told to try again in an hour. <br> <br> An hour later I tried again and airtime was loaded, two minutes later the airtime I tried loading that morning was also loaded. my airtime loaded twice.<br> <br> I called the help line again and was told ill have to wait till this morning for them to see if both have been charged to my account, now I phoned again this morning as I want the second airtime load to be reversed and I am now told, it was already loaded to my account due to it being pin-less transaction so I didn't get a voucher number to load and that it cant be reversed they will need to first see if its possible to do this by speaking to the cellular provider.<br> <br> You told me to redo the purchase in an hours time, and I did, now I have to pay for airtime I didn't want.<br> Honestly, if this cant be assisted with I will close this account end of this month