OnAir is not to be trusted

Stay away from Onair contracts... I had a contract with this people and was contacted just before the contract was supposed to end, the consultant told me January was my last payment so I can upgrade but I refused and he insisted that I will not pay anymore for the old explora so which means I can afford the new Explora... Now when I query why my account is still debited the answer is that the consultant may not have had access to their system! So who else have access to my banking details but not to OnAir's system? So MY details is easily accessible but not OnAirs' details?? And again, I sent an email today, they reply after a week... but the debit orders is not deducted late!!! I gave the date and number from which I was called but the person responding to my email still tells me the last time I contacted them was ??? Can i be treated like a paying customer and please investigate who called ME, since I gave you all the details of the call??