account arrears issue

Hello Peter, I need assistance, On Air has listed themselves under my profile to say my account is on arrears. my account was paid up in February 2023 and they used to complain and say I owe previous months and when I send statement they keep quite and say nothing. In March I have send them my statement from the time they say I am owing and they did not come back to me and now they have listed themselves under my credit score and says I am in arrears. they will send messages to say they have been trying to call which is a lie as they have never responded to my mails with bank statements as proof.