Rust Consulting -Citi Bank Fraud...Ripped off.. minneapolis Minnesota

I put down $110,000 on my home, my lifes savings. 2 years later after the auto business took a hit, and a divorce I had a remod worked out..Well, Citi bank foreclosed on my home even though payments were made on time as the remod was approved. I lost my home, citi bank sold my home and pocketed the $45000 in equity and left me with nothing, I am still paying on a 2nd mortgage for this home thanks to citi bank keeping the equity? I got a check for $1,000, called and email rust consulting daily with no answers, noone will call or email me back..I refuse to cash a $1,000 check.