Obligation to pay visa expenses to employer in case of early resignation

Hello,

I am from Bosnia and I currently work in Dubai. I came here on the 13th of November this year.

Currently, I have only an entry visa and I'm waiting for the medical exam to get visa stamped in my passport. My employer didn't give me any contract to sign. He provided me with a visa, accommodation, transport and food.

Now, I have an emergency situation back in Bosnia and I have to go back. The employer told me that I have to pay for all the expenses to him if I want to go.

Do I have to pay it due to not having and signing any contract?

And when I have my passport back, will I be able to go home without paying expenses to him?

I asked him for the contract, he said that I don't have to sign anything.