Pineda's Landscaping Won't Honor Contract/Agreement Lemont Illinois

I had a Brick Patio done 9/8/05... The Patio had to be repaired within 1 week of installtion which they did come a repaired a huge dip in the center. The problem NEVER went away the entire pation has really shifted/seperated REALLY BAD including 2 steps. I have called Olegario Pineda at 773-418-2146 since 2005 with no prevail. He stopped answering his phone after the 3rd call and told me to "DO WHAT YOU HAVE TO DO!!". Olegario Pineda (nephew of Ruben) told me to call this number 1st when patio was being installed. Olegario (Ruben) Pineda gave me a 20 year warrenty agaist defects and I do have this in writing. I reported company to the Better Business Bureau 4/26/2010 and company NEVER responded to Myself or the BBB ...I will take every action I can !!! Since this is the action Olegario Pineda advised me to take... Patio just needs to be fixed!!