What should I do if I can't provide a return ticket for my O visa application while in Thailand?

Good evening admin..im from philippines and newly married to thailand national.after marriage..we apply my o visa.and i complitted all the requirements except my passport.because when i come to thailand ..i used my old passport under the name of my late husband..(im widow).but i take my original documents that i am sjngle.my CENOMAR.(from PSA)birth certificate and death certificate of my late husband..so i regitered the marriage on my single name....but they suggest to go back to.my country to change my single status..so i did and i apply o visa in philippjnes.in thai embassy..but they advice to do it through online..so i applied it but because i confused when they asking my recent travel document..i send to them. My old paspport where i used in first tjme and married here in thailand.so it is not match in my married certificate..so they denied it...i recieve email that denied but i am here already in thailand..so they told me to reapply again..but when i go to the website they are asking me to send the booking ticket..how i do this..i am now in thailand ..not in philippjnes...and i have no computer here so that i can do ot easily....we are thingking to gobto the fixer office but its too expensive..my thai husband is only a simple life living...working in the hotel in koh samui.and me i cannot work here because i have no work permiti i need first to have o visa then apply to permit to work....but they denied.through my mistake upload passport ...i dontbknow what tondo. I dont know who i can talk...or asking dvice so i jojned tonthis group maybe it helps.. any advice my friends? I need to appy o visa..but the system asking my book ticket which is i am here now in thailand ....thank you so.much..please help me..i have more 16 days to stay as tourist here