What do you mean college and ex-students refused to help you? Where are you staying right now? Did you lose all your belongings too or is it the documents alone which you lost? Well police also can search for your documents but they cannot be blamed for not being able to find out. However, the college should be able to help you. Travellers cheque can be cancelled. So, cancel them first. May be they already used them. There are a lot of things which you need to tell before we can say anything. Moreover, talk to the people who are studying there in your college now.