OVERCHARGE

i orderered on ASAP app for amount of 384.94 but they decided in their wisdom to authorise 830.94 through my bank. now i am quering it as the amount of 830.94 is pending authorisation on my account and the right amount has not been charged off my account, according to them they have done nothing wrong and shows paid on their side. now i must send account statemnets to prove the transaction but uts sitting on pending so does not show on statement. BUT THEY ARE UNABLE TO UNDERSATND THIS!!!!!@ THIS IS THE FIRST AND LAST TIME I USE ASAP, ILL STICK TO 60/60