OnAir

I entered into a 24 months contract , during 2015 - 2017, In 2017 I paid my last installment of R149. Luckily I still have my e-mails confirming my final payment with OnAir. Now, two weeks ago, somebody from OnAir phoned me, informing me that I am R477 in arrears. I could not believe after 3 years they phoned me. I forwarded them all my e-mails and requested a statement. I still after numerous mails still await a statement. Last night OnAIr debited my bank account with R149, can you believe the audacity. Luckily I managed to reverse this transaction. I mailed OnAir again this morning, requesting a statement - still not received it. I also requested a Manager to respond. Still nothing.