I can’t choose a plan.

[ObedN7315]

I just top up 13 euros to buy a plan. But I still can’t call because it’s telling me my monthly plan has runout.

[dalyer]

You'll need to clarify. 

What exactly are you trying to do, what steps are you taking to do it, what happens/goes wrong, any error messages, etc. 

Where and when exactly is it saying that your monthly plan has run out? 

If you need a plan and have added €13 cash credit to your account then you still need to buy a plan and use the cash credit to pay for it: 

• https://48.ie/my48/memberships
• https://community.48.ie/t5/The-Knowledge-Base/All-About-Plans-and-Payments/ta-p/53105
• https://community.48.ie/t5/The-Knowledge-Base/How-do-I-buy-a-Plan-Add-ons-or-Top-up-on-My48/ta-p/268

Just having cash credit on your account doesn't give you a membership plan. 

When did you last successfully buy a membership plan?

If you need to contact 48 support about this then see the links in my signature below.