Jomtien immigration DO NOT use or recognise the TM28. They haven't for the best side of 2.5 years. They use the TM30 ONLY and for both, change of address and notifying of an address.
The UK once had lots of 'Real Universities'. They were mostly just an office running the visa scam until they closed them down and deported the 'students'.
My Canadian embassy told me they too will stop, I went for my letter of income lastweek and the woman at my Canadian embssy BKK ,(who has been their for years) told me this was coming ,I asked why ,she replied ''too much paper work'