Since last year Sept...

Since last year September I have been getting messages that I must pay 2500 for car insurance but I don't own a car then I went to Old mutual to ask about this then they called iWYZE to explain my situation then they said they will escalate it, I went to old mutual three times they kept saying the same thing at iWYZE saying they will escalate it till today I haven't heard from them and they said they will contact me, I m afraid it might ruin my credit record.