I spoke with att and they did not want to help me unless I signed up for their monitoring service. I was hoping that you may have advice or recommend a product that will enable me to utilize all the equipment I already have in my house without paying a monthly service fee
Just to preface, we cannot provide support for the system you reference. suretyDIY is an Alarm.com service provider. We do not use those products you mentioned.
Now that said, I believe based on limited experience that they utilize zigbee wireless protocol (915 MHz) or 433 MHz for their sensor devices. The first thing to do is to verify the model numbers of the sensors and any automation devices. You can look for information then on what wireless frequency they use and find an appropriate automation hub that can use them if possible. The wireless frequency may be posted on a product sticker.
Note that the model number you mentioned, SR-KPD02, is just a keypad for the system. There would be a DLC-100 controller somewhere which is the brains of the system.
If 433 MHz, they may be DSC compatible.
If they are zigbee, an automation hub which uses a zigbee radio could probably be used.