You have reached the current limit on mobile. If you wish to cut out the wait for the next update there are more levels available on Facebook and at king.com.
Without video or at least a screen capture it's going to be next to impossible to say what's going on. have you tried playing the level again since the incident? Is it still performing in the same way? I just played the level at king.com without any problems so have you maybe considered that option?
Surely it's your responsibility to upgrade available memory or clear space in the existing memory? What are you expecting King to do? Reprogram everything to suit your memory?
Gee. If only I'd thought of that in the other 344 levels! Using all the tricks that have gotten me thus far with 3 star scores on every single previous level I am still unable to get any nearer than 12 remaining bubbles on this one. If I can't do it then I'd suggest that few or none are able to. I'd be grateful for…
What does the score beneath the Witch Doctor say? To get the upgrade you need 135/135. If it's any less than that you've missed a star somewhere or you haven't reached all the necessary levels even if you think otherwise..
That would be the colour change candies then. They cycle between two colours changing at the end of each move. You can therefore anticipate the changes but, for the most part, I tend not to bother and just make matches in the normal way.