Missing Medication

I am beyond furious with the service I have received from Pharmacy direct. Firstly, when you call the call centre and hold the line for more than 5 minutes and the phone just gets cut off. I email/fax my script over and over but still they don't seem to get it. I am leaving for Thailand on Wednesday, 16 March and asked for ALL my chronic medication to be delivered today. AGAIN, I am missing one of my medication. This is the second month that there is medication missing from my delivery. And not the same medication each month, different medication. How difficult is it to just deliver ALL the medication at once? This is beyond frustrating!