Fast and effective potty training?

I am completely out of pull ups for my 2 year old and I cannot afford to buy anymore since I left my job after having my 4 month old. And currently have no way to get any money for pull ups. So time to potty train. Anyone have any fast potty training tips? My 2 year old knows when she has to go and she knows she has to use the potty because she tells me she did go or she has to go but she refuses to actually do it. Shes not too yiung. She understands completely how to use the toilet and that she needs to but she refuses and goes in pants just to be defiant