Trellance Senior Java Developer interview questions

There were two technical rounds with average difficulty. I cleared both the round smoothly. But in HR round, HR was behaving very rudely. He did not want to release the offer. He asked me sign a bond to make sure I will join his company. I fell to join his company then I need to pay 1 month salary. I denied to sign a bond. His behaviour was also so rude. No HR ask to sign a bond with more than 8 years experienced candidates. I request you to please don't go for interview.