Help go locker issues

[dulla mambi]

Hi guys,
yesterday i installed go locker, then it asked to install go launcher EX and i did, this morning ive noticed that my phone (samsung galaxy wonder) became so slow, not only that now i cant play any video, not even those that i recorded by using the phone, i cant play any music, and most annoying is whenever i make a call it automatically goes to speaker mode and i cant change that.
ive already uninstall the apps but i still have the same problems, any HELP?

thank u in advance