annoying calls

this CBE group has called my cell and my home phone without my permission and will not state the nature of their call but continues to ask me for my personal information. today i was at my kidney dialysis and they continue to call. for those who don't know kidney dialysis replaces your kidney function. the process takes 3 hours and is done 3 times a week. it removes your blood from your body, cleans it and returns it to your body. this process is draining and painful at times, so the last thing i need is to be harrassed by anyone. i want them to stop.