You do not know repair smash the roof? About this you can learn from this article.
For a start sense search service workshop by fix roof. This can be done using yandex or rambler, site free classified ads or profile forum. If price fix you want - believe task solved. Otherwise - then you have solve question own.
If you decided own practice mending, then the first thing necessary learn how practice repair roof. For these objectives has meaning use finder, or read archive issues magazines like "Skilled master".
I hope you do not nothing spent efforts and this article may help you solve this question. In the next article I will tell how repair subwoofer or plastic bumper.