Medication

My partner was involved in car accident after his discharge the hospital has advised that his script for medication was send to Medipost pharmacy, going forward they will deliver his medication on a monthly basis last month they have send incomplete medication advising us that they are our of stock for that particular medication, then I called again now they are saying they are still waiting for authorisation how possible is that because last month they were out of stock, now it was schedule for the 22nd of May its almost a month that he was without the medication, they are still going to send the same medication again, every time we must call to inquire, if they was any outstanding balance they were gonna call and ask when can we make the payment