Ask HN: Should I sue drchrono (YC W11) for violating their contract w/ me?

[1 of 2]: My name is Dr. Dal Bedi. I'm owner of a medical practice in Va. I took a chance on a start-up drchrono as my EHR & billing service provider; both services being a vital part of my business. It's a decision I wish I never made. In the past 5 mo, I've had massive issues w/ the drchrono service. The setup of their billing & collections services has taken 4 months due to repeated, inept errors by outsourced-to-India drchrono billing staff. Other drchrono users have been complaining about similar issues & have asked for refunds: http://bit.ly/1doMER9 & http://bit.ly/1fL8dzH. I've forwarded pages of errors to the drchrono staff http://cl.ly/image/200i2D2y1s2R , http://cl.ly/image/1z0g230x0N1I , http://cl.ly/image/3H072F0f3k43 , http://cl.ly/image/0k3G1t2h3h3w , http://cl.ly/image/0V1x2h3E2m43 , escalated w/ their support team for months, and finally escalated to the CEO, Michael Nusimow. When that proved ineffective, I asked for a refund for the months when the service wasn't functional, all while being a committed customer w/o a single outstanding balance. This past Xmas Eve, drchrono sent me an email raising my monthly fee 3x from $1.5k/mo to $4.5k/mo starting Jan 1st, 2014 w/o any reason given -- even tho. we have a signed contract which sets the price for their services and can't be changed.