Always dead connect

[Elyana_Starfall]

PS3, server phoenix. Italy

Hello.
This is the third time I post in this forum, and you always move my thread into either different support required or solved. It's not solved and SE support haven't been able to help me.
I'm starting to be sick of it, really really sick of it.
Everyday I can't play from about 14:00 GMT+1 to 24:00 GMT+1 because of:
1) I go randomly dead connect either in instances and in open world doing nothing.
2) During that I can't retrieve data from server (I'm on phoenix) such as duty finder which stays forever on obtaining data or friend list which can't load any friend or I freeze if I try to interact with any in game item and my skills doesn't land even if it seems I have pressed their buttons.
3) Either I stay frozen for 4-5 minutes and it recovers by itself for 2-3 min before going dead connect again, or It kicks me from the game after the freeze, error 90000 and stuff.

I tried everything: portforwarding the router, upgrading it, restarting it, changing it, setting DMZ on ps3 but nothing worked.
I contacted my ISP which said it was all ok but sent me a technician anyway to check. Everything is fine. Plus, the fact that it all began about then days ago, lead me to think it's a server problem or something similar. It's about the date of ps4 release, so I'm supposing it's about server congestion or stuff.

PLEASE ASSIST