I installed one Screen-saver programme, 'XXL Screensaver' which was asking to reboot the phone for each and every option. Hence, I uninstalled the programme. To get the programme removed totally from my phone I wanted to reboot the phone and switched off. When I tried to switch on the phone it is failed and gave "PONE FAILED TO RESTART, CONTACT RETAILER" message. Can any one please help me to come out of this problem. Thanking you in advance.

It looks like you need a hard reset: (*)+(3)+(green)+(power on) when the phone is switched off. Power button must be pressed the last one and all the keys should be held untill "formatting" will be displayed.