Contract of Guarantee vs. Surety

Main kuch confusion mein hoon, please kuchh sahayata karein. Kya right hai, yaa main kisi surety ke contract ke bare mein soch raha hoon.

Scenario 1: X ne Y ke liye zameen ke property ka kathinama kiya, lekin X ne kaha ki yeh guarantee hai, jisse yadi Y kathinama se paise na dete hai toh X kharaab hoga. Y ne zameen ka kathinama nahi kiya, aur ab X kahti hai ki Y ne guarantee nahi ki hai, aur woh usse koi bhi paise na dete hain.