Canadian Neighbor Pharmacy / unwanted phone call

I, have receive over 30 t0 40 phone call a week from this company. I will be at work, Church anywhere they call from so many different number I can not keep up with them. I am not suppose to get these call at work and I told them but they still call and harassed me every day of the week and weekend. So I am asking for help before I loose my job over this type of stuff.