Poor service

This is to express my utter disappointment with the service I've received from Cel c. So, I paid up my contract account mid April this year.Received an SMS saying that the account will be deactivated. 1st of May, account was deactivated. To my surprise, Cel c deducts the settlement amount from my bank account end of May, what for when the account was paid up?! Phoned the call center, they try to explain what happened and that funds will be refunded within 48 hrs. A week later, no calls nor smses from cel c to explain why the refund is taking long. I had to call to find why there's a delay. The consultant informs me that she'll send the request again, after 7 days of making the request ? Now I'm told that I have to wait another 7-21 days to get my funds back for an error made by cel c! How inconvenient. On top of it all, the refund will be less than what was deducted from my bank account. I'm never having any dealings with them ever again.