I don't get why people are so worried about their spar ratio (I am not the best sparrer my W/L used to be like 50/300 and its now 500/600). When you lose you lose it's not like you are going to be instantly good at sparring, and there are definitely going to be times when you are just not having a good day.
But I can say people who've started Graal on the iPod (2009-2012) did not have the luck of the draw but there are measures to help new players with sparring like instead of waiting the time limit to enter the spar you can actually go and spar at Master Li's just to get better at sparring to have a chance to win against people at the battle arena.
As people have been saying, delete the app, get a new account wait the 50 some hours just to enter the battle arena and start over from 0-0 again. To me it sounds like a waste of time but the chances of there ever being a spar reset button (or something like it) is close to 0.