Philippine Airlines have advised up to 5 months wait for a refund. I had two return tickets BNE - MNL in J for late September. These flights were cancelled by PAL in early July. My initial email for a refund went unanswered and my follow up email a month later got a response advising they had processed the refund but also stated this,
"Due to the high volume of requests and limitations from the enhanced community quarantine in the Philippines, there may be some delays in the processing of refunds. Please allow 5 months from the date the refund was processed (or an average of 5 billing cycles) for the amount to be credited back to the account used."
Guess I am grateful that PAL offered a refund at all (just saw MH_fan's thread), I also had the option of a taking a travel credit + 10%, or re-booking.