Builder's Delayed Delivery Dilemma

Mein aapko ek scenario sunaunga. Ram aur Sita ne ek builder se ek flat ki booking ki thi. Booking ke samay 10 lakhs ki registration ki ja rahi thi aur 12 mahine ke andar flat tayyar hona tha. Lekin ab 2 saal ho gaye hain aur flat abhi bhi banai nahi gayi hai. Builder ne kaha ki koi problem nahi hai, bas thoda samay lag gaya hai. Ram aur Sita ko lagta hai ki builder ne unko jhootha promise diya hai. Inki to problem hai ki kya vah builder ko samjhane ke liye court ja sakte hain ya ki ismein TPA Act ka kaam karta hai ya property law ka?

Kya legal remedy apply karta hai is scenario mein?