I was supposed to fly to EWR-BOS-SFO yesterday on a UA award ticket but due to the following circumstances I am still in New York after full day spent in airports and planes:

1. Originally booked flight CO1120 from EWR to BOS was delayed from 8:30 am to 10:00 am due to mechanical reasons
2. I am rebooked to flight CO3215 departing to BOS at 9:45
3. I make it to UA177 flight to SFO but Continental had changed my reservation assuming I would not be able to arrive to the flight (why allow me to get on board on the first place then!) and not allowed in the flight since it was oversold
4. Back to CO, they tell me that the only way I could get to SFO that day was by flying back to EWR and then fly to SFO. I am rebooked in CO1105 connecting with CO348 that had a departure time of 6 PM. Flight 1105 first gets delayed by ATC and afterwards because of security Issues, resulting in an arrival to EWR at 17:55 and missing my connection
5. Continental rebooks me for Tuesday 27th of July, and I don't think it's even necessary to give any comments about this.

At that point I decided it was too much and decided to stop trying to fly, cancelled all flights and asked to have a taxi back to Manhattan

This was the first time I ever flew with CO and I don't know what I can expect from them after ruining my 4 day vacation. I live in Sweden and came for 3 days in NY and 4 days in the bay area, so really disappointed..

what to do? What to expect from them?
thanks for your help!