In mechquest how do you get rid of mechs i have three and it says my mech inventory is full

If you want to buy another mech and it says "inventory full" either go to tek's mechs or if you are a star captain go to the area where tek's mechs and there will be a blond girl with a short blue dress standing next to the sign board. If you are a star captain go ahead and tlk to her and say "add mecha slots" and you can spend 200 nova gems for 1 slot or 7000 nova gems for 35 slots.