Pathetic customer service from service centre - refund query

Took car in for service on 31 Jan. When collecting was told I must make payment for a chip repair done even though I opened claim from my Insurance for AutoBoys who did the actual work. Kia told me I had to claim back from Insurance but this was not the case as my Insurance paid AutoBoys directly. Called every second day to try & get my refund from Kia, keep being told they will call back. Escalated to their Head Office Complaints division and still waiting for them to get back to me.