1999 Ford Escort transmission problems

Noticed that engine warning light was coming up on and off, changed spark plugs,wires, light would go off for a period and than come back on. I was driving down the freeway between 65-70 miles/hour when I hured a loud bang , pulled off the freeway, I had the car taking to a local ford dealership, service writer told me that the valve seat in the head had seperated and fell into the motor. He also told me that the 1.9 motor had a flaw in the head and ford motor company new about this problem for many years.

Ok, so I just bought my 1999 ford escort zx2 on december 1, 2008 at 82,000 miles. 2 months later I needed to replace my alternator in february 2009. In may 2009 my engine blew, apparently the #1 rod separated and went through the oil pan. I replaced the engine since I still have a loan on the car. It is now july 2009 and my transmission is slipping. I only have owned this car for less than 8 months and repair costs are more than what I paid for this.