Hi

I bought a multi-destination ticket with TAM, however one of the legs (LIM-GRU) was operated by LAN.

I came to LAN's check-in desk in Lima, but the system could not find my booking. I proceeded to LAN's customer services desk: although I presented my booking confirmation (incl. booking reference & e-ticket nr), they said my ticket was not valid and refused any further help in that situation. LAN employees at the airport were a kind of those robots repeating "we are not responsible for this problem, please contact TAM".

TAM office had closed 30 minutes earlier, so at that time there were no TAM employees at the airport.

I called both LAN and TAM call centers, but neither of them would help me, nor rebook me on a later flight that day.

Eventually TAM call center booked me on their flight next day, but refused to provide me any accommodation or food, leaving me at the airport for 19 hours (overnight).

I've never got any apology nor explanation. I was forced to stay at a hotel for 200 USD.

Which airline was responsible for taking care of me? TAM or LAN?
What were my passenger rights? What law guarantees them, Brazilian or Peruvian?

What are the consequences of leaving me without assistance and what compensation should I expect?

Thank you for your help