Wrong subscription to game pass utlimate

Hello everyone,

I'm having a problem, I wanted to subscribe to xbox game pass ultimate 3 months for 1€, I never susbcribed to any offer before, but when I look on my account I only have 1 month for 1€, I am a little bit disappointed, I tried to contact Microsoft but thet
told to contact Xbox support because they can't help me, they say that I chose the 1 month offer, but I chose the 3 months offer and I don't know what happened, but I am unable to contact Xbox support, there is no chat/call option (France), it says that support
doesn't work. I am disappointed because it's the same price, and I can't change it.

Do you know what I can do?

Thanks in advance.

:)