Vauxhall Tigra Brake Servo Problems

Since it has been raining heavy my car is full of water on drivers side. There are no drips I can see when its raining. I have taken out the rubber bungs under car no water came out. My car hasnt been used for a while and water still fills...

Footwell Behind passenger seat and footwell in drivers side sipping wet only noticed this year, causing really bad condensation. Although I know this seems to be common problem but how can I fix it, considering new car if too expensive so p...