BULK API 2.0 is it released and I can used in production? how can I get support in case of any problem?

I am testing BULK API 2.0 v41.0 upsert and I am getting these error
Please include this ErrorId if you contact support: 351860114-19601 (1615823202)","errorCode":"UNKNOWN_EXCEPTION"}] 
are ther any one know to which URL I have to use for contact support.?

Thanks