Should be 2 days.
U can actually dispute again as long as the order dont turn to "completed".

tips for getting the shopee dispute team to respond your email ASAP

since they like to put response by xx/xx date, I responded for my case yet they still cancelled my dispute bcos they no reply me for few days

so the next email I just tell them I'll file for a chargeback with my bank, and i got a reply within half a day, and offered me partial refund even the fund already released to the seller.

so the keyword here for getting their attention is "chargeback"

you bring the dispute to your bank to reverse the CC charges
most of the merchants are afraid of chargebacks, very afraid

Shopee is getting ridiculous. If u have the same address linked to different accounts, even using different phones, u would get to enjoy the promo perks or vouchers etc. For eg if i am having shopee registered with the same address as my brother/sister living in same house, one of us will be blocked from using the promo vouchers. So frustrating.