Unfortunately there is nothing we can do.
The entire online application service for the Visa on Arrival for Bali is handled 100% by the immigration department. If you run into problems, this is what they said on their website:
"Kindly inform the e-VOA Support Desk (livechat at www.imigrasi.go.id or sending email to email@example.com or firstname.lastname@example.org) should you encounter any suspended or unsuccessful transactions during the request procedure."
Sometimes confirmation emails land in your spam folder, that's the first thing you should check.
Their website seems to be changing rather frequently, and sometimes some features seem to not work on all browsers equally well. What we noticed is, that if you tried to extend a visa and the process failed, it seems you have to then wait one more day to see the extension option again.
Worse case, if the application fails, you can still get the Visa upon arrival in the arrival hall of the airport (Visa on Arrival).