Reimbursement for Modem

[wireless]

I returned a modem to Telus when I closed my account at the end of August, 2017. On October 18, I was charged $157.55 for this equipment on my credit card. I called Telus, gave them the Canada Post tracking number, and they found the modem. On Nov 4 they credited my Telus account for $157.55. However, they have not reimbursed my Mastercard. I have tried repeatedly to call Telus over the past 2 weeks several times each day, and every time I call I am told that their wait times are exceeding one hour. Since I no longer have an account with Telus, I want this credit reimbursed to my MasterCard but I do not want to sit on the phone for over an hour. Do you have any advice?


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