Medications Shortage Putting Lives At Risk

My local boots is closing in a few months but I get medication shortages when I go to pick up the medication. I've told them to only text me when the prescription is ready and it's complete. I sometimes have to wait until I only have a days medication left and sometimes they phone the surgery to get them to authorise a higher mg dosage and I have to take one and a half tablets. It's normally my epilepsy medication but once it was also the Lansoprazole 30Mg tablets I also take.