Problem buy domain it blocks

[karimzzz]

i want to renew the domain www.karimblal.com when i push Buy it gets stucked and gives An error has occurred, the service is temporarily unavailable. Please try again later. If the problem persists contact us through the forum. PLEASE I NEED THE DOMAIN SOON

then i even try to change the country because i go back and forward between france and italy and now it displays this message
Unknown error, try again later
If the problem persists write to registration_domains@altervista.com
uff

[dapeco]

Hello,

you have as just as necessary AlterCents to renew the domain without paying.