Avis Car rental *****ing from their clients

Avis Car rental stole my deposit after they did not do their work. After several mails they just have not responded and it seems they do not care to.

Email i sent to them,

On Tuesday morning 9th of October I picked up a vehicle by PE airport, I signed my papers inside the office by the front desk and received my keys. I Then proceeded to my vehicle after I asked the front desk is no one going to check the vehicle with me. ( Front desks response was there is no need as they already pre checked the vehicle) I received the vehicle with a crack in the windscreen, I went on my way thinking this would not be a problem as the front desk told me they pre checked it. After I returned and handed in my keys to the gentleman checking the vehicles he said I must fill in some forms to state that I received the vehicle in that condition. After filling in the forms they said all is well and I was on my way. Now Avis decided to deduct the money of my deposit, It seems your PE team blatantly **** to me and did not do their work properly, Now I must pay for their negligence