A year old tombstone that is peeling (Royal Tombstone)

I bought a tombstone 2024 in Royal tombstones Limpopo around May, and was erected around September 2024, by April 2025 I reported that the tombstone was peeling and there's white powder coming out of the tombstone. Ever since I reported no one has actually came back to me, they wanted pictures Ive given them pics, I filled in a repair form 18th of June 2025, to date no one has called or did an appointment to go and fix, and the workmanship on that tomstone is not satisfactory. I seems a person was using fingers to put glue, was never cleaned its now peeling and clumpsy so untidy. It feels like we have been cheated because we paid for an inferior service. I tried calling asking for the manager and I was told they are not allowed to furnish us with the manager's details, what type of a business is this where the manager doesnt want to speak to clients. I then wrote an email, I was told to forward it to the clerk then she will forward it to the manager as we are not allowed to speak to the manager. I MADE THE BIGGEST MISTAKE BY THINKING THAT THEIR PRICES ARE EQUALS TO THEIR SERVICE. Can hello peter assist me with the ombuts man that I can contact on this issue, Im fed up.