Hi Clogger
MYOB will fix most issues caused by bugs for free. It is easier for them if your file is online. If offline you will need to send them your file.
How long this will take depends on MYOB. Most experienced support staff have been sacked. Many support services have been outsourced and sometimes the new staff may take longer to grasp the issues and apply the fix. You may need to contact them several times.
As with most cases, the paid option is much quicker. Free option may take longer.
I have tagged a couple of moderators, hopefully you will hear from one soon. Princess_R Celia_B
Regards
Gavin