The ₹20,000 is a running total of deposits on one Tiger Exchange ID, not a single payment. Many small deposits count just as well as one large one. Spread over weeks, if you like.
Deposits go in the normal way, through UPI, IMPS or NEFT, and the counter matches each one to your username. The full deposit and payout routine, including what to send after paying, lives on the Tiger Exchange payout and top-up routine, so it is not repeated here.
Whether you reached the total while signing in through a 247 address or a 365 address makes no difference, since the sum is kept against the account and Tigerexch shows the tier wherever that account signs in.
Running total: ₹650 + ₹5,000 + ₹5,000 + ₹5,000 + ₹4,350 = ₹20,000 on one Tiger Exchange ID, so that account qualifies; one message to +91 81097 11726 gets the tag confirmed.