Medlife — Offer calls

My sister booked some medicines for my mother from Medlife. There were no issues on placing the orders and receiving them. But from that moment of placing order once, we are getting calls on minutes basis. In every one hour we get atleast 30 calls. If we blocked one number then they use different one to call. Every time they said we have an offer for you. Even if a person is getting offer or free medicines, nobody in this world wants to eat it and no body wants to stay sick. If a person is ordering a medicine that means he or she is already in stress so by giving calls on minutes basis you are giving that person a hard time.