I had them report to the CRA's also. I sent them the DV letter with it stating that until they can validate, they must not try to collect which includes reporting to CRA.
They have not DV'd yet and it is not showing on my CRA.
If they don't respond within 30 days, check your CR and if they are still reporting, send them a notice that they are in violation of the FDCRA (include copies of your original notice and CMRRR and green card), threatening to take illegal action.
That will stop them in their tracks until they can validate.