I didn't say I'd do that, but if I were looking at playing GT5 for 10 hours a day for a week to get from level 32 to level 40 (which I wouldn't be), that'd be how.
He can't hear you, due to being banned - and they don't generate enough XP between them to get to level 40 that quickly and he can only access the last one once he's already level 40 and he can't access any of them at this point because he's only level 32.
Why? At 50K or so XP per win, it will still take a lot of repeating the same race over and over and over to get to 40. Some people have the game to enjoy the driving, race online, drift or run time trials - none of which pay very good XP. There is more to the game than reaching level 40 as quickly as possible
You need something like 29 million plus experience for lv 32 to 40. There are races in the seasonals paying 10K experience per minute. At this rate thats 2900 minutes doing a race paying 10,000 per minute over and over.