How many more times do you need to be told?

I don't understand how many more times I need to contact Markhams to get my old cell phone number removed from ALL their DIFFERENT systems. As far back as February I've been trying to get them to remove my old cell number which has been given to one of my kids to use. However, every month without fail they persist in sending details about the balance & instalment to this number. Please REMOVE my cell phone details from all your systems with immediate effect! How difficult is this??? You are compromising my account by continuing to send information to number that I've told you to remove!<br> <br> Ref ***c0 Allenique / Supervisor Liam.<br>