Tariff

Hello, 

I have the “GO Plus” tariff which costs 23.70€/month for 3 years and in my Orange app it says “Your current plan is no longer available.Upgrade to our new mobile subscriptions for an optimal experience” but it still works. My question is do I just choose a new one from the options they gave me or I have to contact them? Also, in the emails it says that the payments are done automatically but that’s not the case. I have to manually pay it every time. Is it maybe because of the tariff that doesn’t exist or? Thanks in advance.