Double-Charged on Internet Bill

I was recently double-charged for my internet bill. I have two transactions from Telus, on my credit card, that have been “posted.” I have also verified with my bank that both of these charges have gone through. However, the double-charge is not reflected on my Home Services account, which is extremely troubling to me.

I have contacted Telus support several times, all of which keep telling me that there is no double-charge on their end (even though there is on my end!). I’ve been told it must be a pending transaction (it is not), or that I’m reading my credit card bill wrong (which I also am not - I have confirmed with my bank that the charges have gone through, and are both from Telus Internet services).

Are there any options I can take (other than reaching out to my bank to dispute one of the charges? That will be my last resort). Or is there someone from Telus that can take a look into where that extra money went, considering the support people I have talked to “cannot see a double charge” on Telus’s end since it isn’t on my home services bill?