Septic fields, am I being ripped off?

Mike, I feel bad for you both. First house and this.........A friend of mine is going through this sort of thing now. She is in approx. $800 to find out the hole system is shot. First Qutoe was $11,000 now its up to $16,000. She is getting other quotes now but the guys who did all the work thus far is saying that they started it and the agreement was with them to finish it.I told her nothing is signed and for them to flip off............BTW there yard is trash too now. There system is approx 15 to 17 years old????????Im not a expert but dont they normally last longer? Hope all works out for you 2