And...?
What's the problem?
Your post was blank @SiruiL2377 so there's no real info to go on there.
If you want assistance from the Community Forum then you need to explain/describe your issue clearly.
What happens when toy to buy a plan here?
Any error messages?
When were you last able to successfully buy a membership plan?
Is your payment card still valid, not frozen via your online banking, and there are sufficient funds in the account if it's a debit card?
If you need to contact 48 support about this then see the links in my signature below.
