There are ways to get them to stop calling if you live in the United States. There are law firms that deal with these types of callers (and collection agency) all the time.
Simply inform Online Pharmacy that they do not have your permission to call you any more. Write down the dates and times of every phone call they make to you. Keeping meticulous records is key. Contact a local attorney that deals specifically with harassing phone calls and they will do the rest.
There is a fine, of up to $1000.00 for each and every phone call after you have informed them that they can no longer contact you. I've done it when some agency called me and they had the wrong number. It's your phone for your personal use.
Don't let anyone else use it that you don't give permission to. That includes incoming calls.
Product or Service Mentioned: Us Online Pharmacy Customer Care.
Reason of review: Poor customer service.