If you got Maybank account then you can go to selected Maybank branch for coin deposit into your account, not all of the Maybank branch has the coin machine to deposit.

You prepare your bag of coins and give it to the staff, the machine will sort and count it, then the staff will give you the paper how much is it and usually max 1-2 days will deposit in your account. Mine was less than RM100 worth of coins and it entered within a day.

The last time I went to Maybank main branch at PJ two years ago they said they only accept small amount of coins because machine got some problem, not sure about right now, you can always give a call to make sure before you go.

do you want to order in big bulk? For example maybe RM300 worth of coins per month/week

try giving a call to your local banks first see whether they do sell the service for a fee, some banks do that but they need order 1 day in advance