@Abu *******
I guess you don't even have something which is called a "visa". You are on a stay permit, not on a visa. You most probably are on an "1-year extended stay permit based on being married to a Thai wife". You can apply for the next 1-year extension of the stay permit, from up to 30 days before your current extended stay permit expires (on some Immigration from up to 45 days). The Extension will be issued for 4 weeks"under consideration". Within this period, Immigration is going to visit you and your wife at home, and they will ask your neighbours to make sure that your marriage is for real