"As a matter of fact i am too embrassed to contact my old company now because earlier i chose not to return eventhough though they wanted me back . I know it was not ethical on my part to do so but the situations then compelled me to act that way."

If you're going to behave unethically, you can't very well expect people to smooth out your path for you. Sounds to me as though you owe them something. Give it to them and then see where you stand with them.