hello everyone, I booked an DONE5 recently through oneworld website and yes the ticket was issued by QF. I got a few questions hope to get some help with；

1. from the previous discussion it sounds like it's better to accumulate the miles to QR?? I already put my AA FF number in the booking, how should I make the change?
2. what's the best way to change dates with QF issued OTW ticket? I tried their customer service line which was problematic as many others mentioned. I also twittered Qantas on twitter but never got response. should I just HUCA?

thank you!