What do you do about a colleague who stole the key to your drawer and took 100 Algerian Dinars of company money, for which you were responsible, and do you tell the person in charge about the theft, and is there a supplication or action that would alleviate your burden?

Informing the official about the theft is permissible. The thief has committed a great sin. You are not originally liable for the stolen money because the custodian's hand is a hand of trust, and the trustworthy person is to be believed by his oath, unless you were negligent in safeguarding the key until it was taken from you and the theft occurred; in that case, you are liable. There is no specific supplication for this matter, and one should supplicate with whatever is easy for them.