Refund for overpay

Hi,

Does anyone know how to get Videotron to pay you back the money that they overcharged you?

I cancelled my account in January and since February I have a balance of -140$. For me, that's a lot of money!

I have called Videotron many times and they always say that the cheque is coming, but it has been almost 6 months and nothing!

I paid more and now they are just making h*ll to give MY MONEY BACK.

Any ideas?

Thanks!