Which Channel to Use, and When
Live chat is the one to use when something is happening right now: a deposit that has not arrived, a payout sitting in review, a bonus that did not attach. The agent can open the account once you give the registered number, and most of those cases close inside the same conversation.
Telegram and WhatsApp reach the same team at a slower pace and suit anything that can wait a few hours. Email is for documents. Sending the same question to three channels puts you three places in one queue, which slows the answer rather than speeding it.
What to Have Ready Before You Write
Three things close most tickets on the first reply: the registered phone number, the time the thing happened, and a screenshot of what you saw. For a deposit, the bank reference from the transfer matters more than anything else.
An agent can read the same figures you can, which is what makes a short message enough. They see the wagering left on a bonus, the contribution rate the slot game you played carries, the cashback already credited and where a payout sits in the queue to your bank in Malaysia. Account limits are the one thing they will not change for you by hand, because those live in the account controls where only you can move them.