Bad service delivery

The customer relations with this provider is non existing. my wife's prescription has been renewed in June an sent in to Pharmacy direct for her Chronic blood pressure medication. She received her first batch of 2 months of medication for July and August and thereafter nothing again. Since then she has been struggling to get her next batch of medicine which she needs to get it from them, the answer she gets every time is that there is a problem with the delivery address although she has been receiving it from them for the last 4- 5 years at the same address. this is now getting ridiculous. Her cell no for contact details ***