Thai Airways — cancelled flight

I booked my tickets in advance in july for travel to melbourne to india and then back from india to melbourne in december. The flight from melbourne to india was smooth but my experience back from india to melbourne was the worst. First of all they were not able to link my visa to my passport and they had to call australian immigration to send them a code to link them. I was made to stand there for an hour or so. I have never had this issue before, as i travel frequently from australia to india. I already had tickets with me, but i was made to stand there as if i had done something wrong. I do not understand that why are the visa and passport requirements not checked at the time of booking the flight. I was told that it will never happen for your first travel but will happen once you are going back to australia after you have lived there for a while, which is all nonsense.

The worst case scenario would have been, not letting me get on the flight because they are not able to link the passport to visa while i already have my tickets with me. I paid a lot of money for it and if that is the case they should inform a customer before hand, before they book a flight.

It just did not end there, on the spot i was told that my flight from thailand tg461 that was scheduled to depart on 31/11/2018 at 8:10 was cancelled and i was automatically booked into tg465 departing at 24:05. What is the point of booking tickets in advanced if you are not even notified about your cancelled flight and that you have been put onto a new flight. This is highly acceptable. Upon me asking the employee why was i not given any notification about it and why are there visa and passport issues, he told me even he is not sure about it and they told me to check with the student immigration services, because of this i was supposed to reach melbourne on the 30th november at 21:20 through tg461 but instead i reached on the 1st dec through tg465 at 13:05.

I was told at the kolkata airport that accomodation and food will be provided to me but on reaching at thai airport i was blatantly told that i needed to have the coupons from the kolkata airport. I had to fight for an hour for the inconvenience that was caused.

I had to join in for my work on the next day, but because of this i was in no position to inform my company before hand, that i had recently joined and because of that i have lost my job.