Hardware upgrade fail with old $55 SK plan, pursue or give up?

Hi.

I've had the old SK plan that so many people did back in the day when wireless prices were (more) insane than they are now.

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When I went to take advantage of the $0 S9 on tab large and $10 off per month for the first year promo it was going great and was going to let me keep my plan until the end when it said there was an issue with my credit card.

After days of trying and support telling me maybe it'll be on sale again some day I'm wondering if it's worth pursuing at all.

I still have no idea why my card didn't work or if it was just the system saying my plan was ill gotten and I should be ashamed.

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I'm considering moving to public mobile but part of me thinks I'd miss Koodo for various reasons I'd only discover after I transferred.

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I don't want to keep bugging support if they can't do anything, they've been nice enough so far.

Any thoughts?