Dear Krishna,
Your case is really critical. As Soma said , you have to react to his calls politely, but it is not always possible, when a person did not support in your career. But, what exactly you want.... still you r expecting that due amount from him or you are not expecting anything from him as well as you don't want to help him as he didn't support.
In both the cases, you have solution. If you are looking for your money back, just mark a mail to him asking your bonus/sal/whatever is due, wait for his reply. If his reply is positive, take the print out of that mail and go to his office with one who can support you.
If he says no to your mail, you need not to think whether you have to help him or not. If he is irritating you with mails, block his ID and if he is irritating you with calls, call up to the call center and ask them to block the calls from his number.
We learn many things from many people in each and every stage, whethehr they are bad or good. You might have learned from him how to avoid people. The same message, what you have quoted here about your ex-manager, send it to your ex-manger saying that I was disppointed on that and can't help you sir.
We are professionls, we can't be rude, we should become role models to our juniors and our subordinates. Success is a state of mind, if you believe in yourself, then you will be successful. Success and Excusses doesn't walk together.
All the best.
Regards,
Kalpana
Hyderabad