This also shows you the importance of signed contracts. I have made a rule for myself, that I would never start working without a signed contract. I mean what if someone is just testing you for a few weeks and delaying signing the contract for that reason. It is too risky in my opinion.
I signed the contract but my manager didn't follow the rules according to my contract.
Yes, this is what I am saying, that your signed contract saved you in the end :)