This happened to me as well and I managed to solve it! There is another function in the smart contract called "userBuys", it asks for a Timestamp in uint245 and an address. I guessed that the function spits the number of tokens that an address bought on a given day. Days go from 1 to 350 (I assume, I'm not sure). So I tried the function with my address and random days starting from 1 (you have to press "Read" to execute) and voilá! At day number 4 the contract gave the number of EOS Tokens that I had bought (I was supposed to have done it on day 17). Then I did the whole claim operation (claim function, not claimAll of course) with day 4 and I got my tokens sent to my address!! :)