Car jamming stupid SMS

I constantly would receive a lame SMS saying that suspected jamming on my vehicle is suspected. I mean do I pay so much money monthly for a stupid SMS such as that? Why cant you pick up the phone and phone me. I find it ridiculous that you deem an sms sufficient. Pick up the damn phone and call your clients that pay you monthly and check if the car is safe. Absolutely ridiculous i cannot wait for my contract to expire with you.