mobile

Hi all!I've bought from China the ascend p6,which looks like having a custom rom on it,but it just doesn't allow me to use the play store.The build number of the software is p6-u06v100r001c11b506,the kernel version is 3.0.8-00771-g0c49f24@shaeadculx048 #2.To get rid of the chinese language recovery,I've installed the twrp which was working fine,until I decided to follow,not pretty well,the guide here,on xda,to go from the chinese firmware to the international one,and I've installed the stock rom.From that time,I'm just not able to enter into the recovery anymore,if I keep pressed the volume buttons plus the power button,the phone remains stuck on the logo screen,if I keep pressed it for around 3 seconds it reboot normally into the system,but no recovery or fastboot even from my linux pc.I've tried to download rom manager to install a custom recovery but looks like this model is not supported,so nada.What can I do to install a recovery and get it back to work to install a custom recovery that will allow me to use the play store?
Thank you so much guys,any help is really appreciated!

Marco