HELP-Context service has stopped

[AC Question]

So I got my phone unlocked at a chinese phone repair store and since I got it back whenever I try to send a text or view my pictures a pop up says unfortunately context service has stopped and brings me back to the home screen. The device (Samsung Galaxy S5) is rooted but I didn't do it. When I got it back it had Towel Root installed and two other apps but the writing was in Chinese so I don't know what they were.. I deleted them. Can anyone explain to me how to get the pop up to stop showing up or to fix the problem, please?
Thanks in advance!

 

[B. Diddy]

Welcome to Android Central! Perhaps you should bring the phone back to that shop and ask them for more details of what they did to the phone.

 

[Moeino]

Just use some app freezer application, I used "App Quarantine", just turn on advanced mode and tick on system services in setting>filters then find in the list of apps the context service and freeze it. It worked for me