Default playstore trouble

I had recently tried to flash a 4.2.2 ultimate galaxy rom and ended up in boot look coz I run ics Nd that tym I didn't kw one had to flash a kernal .also I did not take a bkup of my stock rom in cwm so I had to download cwm recovery img for a110 nd it did unbrick my fine
However now
1.YouTube apk does not work says need to Google play store services installed
2.while trying to download smtng from playstore I get either error s-3 or error s-7 aec 0
I tried installing from external source to no use
3.I am presently gonna flash ultimate galaxy with kernal will solve the abv problems
Tnx in advance