Thought answer should be straightforward but was told that frontier is different.

After flying first leg of two leg outbound, my second leg was cancelled by Frontier due to mechanical/maintenance reason (not weather/ ATC issues) which was confirmed in an email

Rebooking link had technical error as it was giving choice to change flight from origin rather than from transit point onwards.

After 1 hour in line, agent told me that since there is only 1 flight per day to the destination from this transit point and next day is full, I am better of applying for refund and purchase a ticket myself on other airlines.

Purchased a last minute basic economy with one further change to eventually reach destination 13 hours later (given 5.30 am departure, had to spend night at airport)

Question:
What is realistically expected from Frontier?

They have put down in writing that they cancelled connection due to maintenance issues

Their website cud not rebook.

Agent told me (verbally) that no alternative is available for next 48 hours and arrange something myself.

Serves me right for opting to fly the misery Airline but what refund I Shud expect? (Entire outbound leg or they will somehow deduct cost of flying first leg and leave me with 5 USD refund? How about baggage fee?)

Any compensation given the overnight misery/delay and have to buy new tickets?