Paid already (with receipts) but my plan was NOT upgraded

Hi, okay. I'm starting to get pissed. I started Slack on a free trial since I need to use it in accessing workspace for one of my clients (I'm a freelancer). The free trial now has ended and I was notified so since I do want to keep working with my client, I figured it's fine I'll just upgrade to Pro since I can use it with my other clients anyway.

So I did. I already ot charged on my card. I have receipts.

But my workspace is still not on the Paid plan. I've tried contacting support but no one is answering.

Do you guys know if they have a live chat support or a number I can call?