Or I just need to buy another 2 code only to get upgrade to tier 3 since currently I buy 1 code already for tier 1?

Mean I need to buy tier 1 for 2 code to get tier 3 and free of tier 4?

This is not same with your words.

I buy 1 Code (Tier 1) then you said only need to buy another 2 code , so I buy 2 another code. THen I Redeem, and boom.,.. now my subs changing to tier 2 for 50 content and mean my tier 1 code is useless. what the?

This is not same with your words.

I buy 1 Code (Tier 1) then you said only need to buy another 2 code , so I buy 2 another code. THen I Redeem, and boom.,.. now my subs changing to tier 2 for 50 content and replacing tier 1 and now changing from tier 1 and mean my tier 1 code is useless. what the?

Proof of BUG :
https://prnt.sc/Mmf7igCyK-2X

I will re-buy AFTER MY MONEY BACK. SINCE CURRENTLY AFTER 2WEEKS AND MY MONEY NOT YET BACK TO MY BACK ACCOUNT. IS THIS APP SUMO IS SCAMMER? SINCE THEY SAID ALREADY PROGRESS THE REFUND BUT MY MONEY ALREADY 2 WEEKS BUT NOT YET BACK TO MY BANK ACCOUNT. THANJS

Hi,
did you rebuy?
Thanks,
Hendrik