If the termination has been on the grounds that you have been absent from work, the company is supposed to, for a duration of at least 14 days send letters of concern by registered post to your residential address ( as mentioned in the company records) stating that you are supposed to return to work. It is only when no answers are received for these letters, that they can conduct an inquiry in your absence and deem you as absconding. For the inquiry as well, they are supposed to send another letter to you as proof of intimation of the date of the inquiry.
Now, as the decision to terminate has occurred in your absence, this becomes an ex-parte judgement, for which you can by right appeal against, so that the inquiry can be re-opened and you are given a chance to explain your side, on record.
Termination in your absence is actually dismissal. This can always be appealed against.
As a start, you can send an e-mail and also a letter in hard copy by registered post, to the company asking them for the findings of the inquiry on the basis of which they decided your dismissal/termination. They are bound to respond. If not, the letter in hard copy that you have sent to teh company serves as evidence in the labour court that no explanation has been provided to you on your exit.