What can landlord do after a notice to vacate?

Fourteen days after asking for repairs, he gives notice to vacate. I informed the landlord that we see this as retaliation. We get an attorney to send a letter confirming her action. We report landlord to code violation, gets violations from three agencies (June 30 none are completed). Landlord ignores all and continues with eviction. He gave a 60 day notice to quit. We should leave on September 30 but stayed. All landlord’s notice were not legal. He could not get an Unlawful Detainer (would have had to lie). He gave a letter to us saying that in two months, my rent will go from $2000 to $3500. Landlord has done nothing under the law she has and is harassing us. In 7 years of renting, no repairs have ever been made. Please help.