When paying through TON Telegram (or USDT Telegram) using the @Wallet bot, if you enter your username in the Comment, tag, or memo field, the payment will be credited to you automatically, even if you change the amount when paying with TON* coins.* This field is located on the last payment page, where you need to press the CONFIRM AND SEND button, before pressing this button enter your username in the mentioned field.
You should enter your username without errors as it is written in your personal account. Remember, we don't have usernames that start with a capital letter, only lower case. If you make a mistake in writing the username or didn't specify the username, then the money will not be credited to you. You will need to contact support, provide a link to the blockchain payment. In this case, the credit will be done through an internal transfer. Dealers will not receive their dealer reward when using this method of crediting.