Collection agency

Got a text                       Pease call "2403744540"  not gonna call it. I don't want them to think its my cell

collections they call me everyday

get several calls from them a day as well as texts that say "Please call "2403744540"

Have been receiving several phones on weekly basis for past two months, sometimes they call three times a day, other times two to three times a week and two times each time they call, they also sent a text the said to call the number.  I've not answered or returned any calls.,  My cell is and has been registered on the do not call list.