Thanks forNothing Toyota Kimberley

I am very dissapointed with the service I received from the service department at Toyota Kimberley, the service advisor I spoke to was very helpful and professional over the phone when I requested just a letter or a e-mail from their service department to confirm that the service schedule on replacing a timing belt on a Hilux bakkie is 150 000km as they told me over the phone she said she will speak to Jaco,I assume he is the workshop manager, who refused to send me a letter to confirm what they told me over the phone because we didn't do a 25 point check at their dealership, I don't want them to give me a 25 point check all I want is a letter to confirm their statement. So what kind of proof do I have to show my client??? Zero!!! As a dealer in the motor trade service is very important to me, without clients you can close your doors, I really expected more from a big dealership like Toyota. Thanks for nothing!!!