Extremely Disappointed with Service History Oversight

I've been a loyal customer of Ford Lazarus Centurion, taking my car there for servicing for years, have a record of all work done. I'm incredibly frustrated and disappointed with my recent experience. When I brought my car in for its last service, I was quoted an exorbitant ZAR 9,000 for a cambelt replacement. This immediately raised a red flag for me, as I distinctly remember having the cambelt replaced in 2020 at approximately 100,000 km, with the next replacement due at 200,000 km or 7 years. Given that it's now 2025 and my car is only at 138,000 km, it's clear the cambelt replacement was nowhere near due. My main point of frustration is this: How could the service department, with my car's full service history on record, quote me for a service item that was demonstrably not required? This oversight not only wasted my time but, more importantly, it led me to not service my car because the quoted amount was so high for something I believed was unnecessary. It's concerning that I was almost charged for a job that wasn't needed, and it seriously undermines my trust in their service department's attention to detail and ability to accurately assess my car's needs based on its own documented history. I expect a dealership with access to such records to be more thorough and avoid quoting for services already performed or not yet due. This experience has left me questioning the reliability of their recommendations and the overall value of servicing my vehicle with them in the future.