Vehicle Services department False Claims to Cancel My Vehicle Warranty Coverage Plano Texas

This company sends out "Immediate Response Requested" letter stating that my Vehicle Warranty is about to expire and if I do not renew with them in 5 days, I will be canceled.

I have contacted them via the phone number on this letter  some months ago to explain I had paid for/financed extended warranty insurance to up to 75k miles when I purches the vehicle and that as of today's date there are less than $30k on unit.

I requested and clerk agreed to ablige that they take me off their advertisement list.

However, he we are in December, two months later, and I get this notice again.

I own serveral cars and truck and motorcycles and travel trailer and boats and and and.  Each one has extended coverage of some sort.  It takes time out of my day to go pull that vehicle's file and look to see when the coverage is up.

What can be done to stop these people from contacting me?

Hope someone out there can resolve this for me and a thousand others who I know are dubt into siging up with them simply because they can not remember if this is the company the have a contract with.  

I feel this company prays on the elderley like me who sometimes can not remember as well as we used to.

Thanks