stolen phone and sim card

While data stored on the sim card itself might technically still be accessible, the only user data which might be stored on the sim card typically isn't. Sim card contacts are limited to simple name/number pairs, and sms messages are only stored to the sim if you specifically back them up to there.

Koodo would not be able to block or delete any of this information remotely in any case.

So you haven't been able to go to Koodo assist to say stolen phone to get your account suspended?

https://www.koodomobile.com/en/help/reporting-your-lost-or-stolen-phone

You can follow the Koodo Assist hyperlink there to report it stolen. Then you shouldn't need a rep to have it suspended.

Have you tried logging in into private mode or incognito mode with your browser see if it works.

You know what? I'm done with koodo. I upgraded my phone ( Samsung A32) and paid the 120 phone tab balance. July 7. July 26, my phone was stolen from inside my home ...I went to police. Police said they won't charge the guy as you can't prove he took the phone and he denies it. Unless my phone miraculously grew legs , and followed him out the door, they left at the same time, I'd say it doesn't take rocket science to figure it out. Ok, so should have a TAB balance in new stolen phone of 300+ . I cancelked the imei and blacklisted the phone. Ordered a new phone , through koodo online, new Sim at $ 50  a month etc. I was paying 80- 100 a month to pay off that tab balance on the stolen phone... despite asurion insurance for koodo saying I hadn't the right insurance., but going to swlf serve the 15 a m9nrh extra i was paying says i did... in October, I get a notice of cut off as my bill is somehow now $ 1667.19 . Calling koodo, I get " not our fault your phone was stolen" wow. Ok so where did these inflated charges come from? They have the rcmp file number, I was paying the tab balance despite having or not having insurance coverage, whether or not you trust assurion or self serve sources, and how does your bill with a new account, even being passed over to your new account from your old account, get to 1667.19 in 2 months ? They won't reduce what I supposedly owe, even tho that account has been closed since July. They won't give me a payment plan below $588  a month, and basically, being transferred 5 times in 2 hours on the phone to deal with this, I end up with tough cookies lady, you pay for everything, whether the charges are inflated. Bogus , or whatever.... and nothing happens to the guy that caused it all. So... I'm completely done with koodo, and will go get a new Sim card and pay my money to a better company with customer service and the years that I was with koodo have all been for nothing. They refuse to help, can't explain the charges, and won't give me a payment plan. So my phone service gets cut off and my credit affected because of koodo shady billing and someone else stealing my phone. Koodo , you can't do better,  so stuff your bill and I'm out.