Customer Service Complaint

I replaced my car in Jan 2022, informed Netstar to cover new car and cancel the replaced car. They did not cancel the traded in car and continued to charge me for two cars when i only have one. When I contacted them in early December last year, they sent me confirmation that its now cancelled and they'll investigate if i had informed them of the cancellation, if yes, I'll be refunded the overpayments. On the 29th of January 2024, i followed up with person handling my query, informed him I've been debited again for two cars, even though I have his confirmation of a cancellation. To my surprise, he didn't even bother to respond. Around late last week, I followed up again and requested management intervention, was told they are not available and another consultant promised to attend to my query and revert to me before close of business on same date. That hasn't happened. Few minutes ago, I phoned again and told management is not available and they'll return my call. Unfortunately I don't believe their promises anymore, it appears to me that they are serious about customer service, I'm just a number.

Wonder if this is common thread in this Company.