Just sharing the "fun" of MNP / porting into Hotlink Internet 365 from Digi Next 15:
1. on Hotlink website, initiated MNP
2. 3 days later SIM arrived via courier - good service, called ahead & stuff to ensure i'll be around
3. 4th day:
a. 10am+ received SMS from Digi on whether i wish to port out, and must reply "Y" to the SMS within 3-4 hours. Done
b. 5pm+ received SMS from Digi "Sorry your request was rejected. CUSTOMER NUMBERS ARE TEMPORARILY DISCONNECTED - INVOLUNTARY. Please call 016-2211800 for help".
sigh.. called & was told nothing was wrong with my prepaid - still valid until mid Sep. I was instructed to call Maxis to try to port-in again
c. Called Maxis / Hotlink 1300820120. Ms Kavitha told me i need to WALK-IN to Maxis Centre to request to try port-in again.
good lord..
keep in mind - initiated via Internet & i've already a Hotlink SIM + my current Digi Prepaid no issue on payment & no contract + pandemic MCO in Selangor now & need to go to Maxis Centre.
both businesses' processes & control people should be shot in the head

Ok, now i am at exactly the same experience like yours.
Digi denied request... When called up Digi, they said no problem to port out, simply ask me to go to get Maxis to submit request again.
knn.