Keys for my unit which I gave to the Agent were given to Maintenance personnel

After entrusting Pretor Home Rentals with the rental mandate, I discovered that the set of keys I had given to the Agent, were now given to one of the Maintenance personnel in the block of Flats. This was absolutely shocking. One would imagine that any professional in the Estate industry would understand the code of conduct in the profession and the responsibilities that go with being handed keys for a unit. I was more astounded with the complete disregard of the risks that this act poses. I canceled the rental mandate with Pretor and I am managing the lease of my flat myself.