Stop complicating things…. !! Ok here are my suggestions: 1. Take IELTs test again 2. Send acceptance of offer with the deposit to Michaella or as instructed on the offer letter3. Apply for ATAS stating you will start in June - ie in time to do English course if you don’t get IELTs 6.5 but don’t state this in the ATAS application, just apply as normal4. Start English course in June if you don’t get 6.5 or start PhD in September if you get 6.5 Does this help?
Am not sure for certain yet when I will be in BKK but will let you know and of course I will love to see you if you are still there and not studying hard here at UH.