What exactly do you mean by "restart my plan" and "my credit had run out for the"?
If you mean that you're on a plan with limited allowances (i.e. a legacy plan and not the current €12.99 plan), and you have used up some of the membership bundled allowances then you need to buy an add-on if you want to use the relevant services for the remainder of the membership plan month.
Membership plans always run their full monthly course and can't be terminated and a new plan started early.
If this is an ongoing issue for you then you might want to consider changing to the €12.99 plan which comes with effectively unlimited calls, texts and mobile data.
If you need to contact 48 support about this then see the links in my signature below.
