Invalid invoice 230 euro

I received a letter from you where you said that I have a debt of 230 euros to you, but I do not have services at that price, and all my services have already been paid. What should I do? You threaten to block my account if I do not pay this bill.

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> The invoice LTE81168 is now ready for an amount of 229.21 EUR.
This invoice was validated through your OVH account:
Your balance is -229.21.
You must credit your account.
Please contact our support to inform us about the payment method of your choice.

I wrote to you in support, but I have been waiting for an answer for 4 days already.