Payment getting declined when trying to upgrade to Pro plan

Hi, I just wanted to upgrade my starter plan to Pro for 19$/month, but when I want to finalize the transaction with the correct payment details, it just shows a red “Transaction denied” message. What does that mean, can somebody help? Would really appreciate it!

Hey there, @cambridgeschools :wave:

Thanks so much for reaching out! I have opened up a helpdesk ticket on your behalf. Stay tuned to your email so that our Support Engineers can connect with you directly.