Tv Issues

Hey guys, just got a JVC 21 inch tv, in Phuket, got home, bought a black coaxial cable and hooked it into the wall and into the tv, did the auto program on the tv, and I had a bunch of channels.. like some of the basic thai ones and channel V, STC, and some others.. I thought i would just have the basic basic thai stuff like 3,5,7 etc but i had a bunch, anyways a few days later it was like my signal just went dead, it was a bit rainy so thats why i thought it died but its been 5 days now and i am curious whats up. Because i am not signed up for cable or ubc or anything it seemed weird that i had all these channels.. i live in a 1 level like jail cell block of rooms.. Any idea whats up? or how to just get the basic (free) channels? do i need an antenna or what? anyways i saw some info about Phuket Cable company so maybe ill call them. any help is much appreciated, thanks

cory