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Time: 11pm GMT+1 and ongoing
Frequency: Constant
World name: Gilgamesh
Character name: Lysandre Ghiramour
Retainer name: None
NPC name: None
Monster name: None
Class/Level: RDM 53
Party or solo: Solo
In-game time: N/A
Area and coordinates: Castrum Oriens, Quarrymill, Limsa Lominsa, Ishgard
Housing: N/A
Steps:
1. Tried logging in normally only for my character to keep getting the disconnecting icon on name.
2. Teleported to Quarrymill to do Palace of the Dead with friends, lag and disconnect
3. Get constant 10105 and 90002 errors every time I try to relog
4. Log into an alt of the same server to see if it's a persistent issue
5. Alt is completely fine, teleported with him to Quarrymill and had no disconnections or bugs
6. Log back with my main character and I manage to get through, after many fake outs of getting in and getting kicked out again, but I'm still getting lag and the disconnection icon
7. Teleported to Limsa thinking it'd be less congested but I keep getting the same issues
8. Teleported to Ishgard since it's almost empty, same issues keep happening and I finally disconnect with a 90002 error again

Connection Specs
- Type of internet connection/provider: Telefónica Spain
- Modem maker/model number: N/A

Further information:

Basically only one of my characters in Gilgamesh seems to be bugged beyond playability when it was perfectly fine yesterday before maintenance. My alt works fine and my internet doesn't seem to be disconnecting.
Please help.