You currently have two problems.
First, please read my guide to seat upgrades in my sig file so you can do your math correctly. Each seat upgrade decreases the cost of the stadium upgrade and the total is equal either way. Pictures are included in my guide as proof.
Second, your stadium is WAY too big for your level and will be for awhile. The maximum size of your stadium should be one level below your current level along with the large seat upgrade. If you are level 3, your stadium should be level 2 along with the large seat upgrade. All you have managed to do is waste money and/or tokens since your stadium is way bigger than your level's stadium cap.
Edward FC currently on autopilot
League: ?
Champions: ?
Cup: ?
K Vegas FC currently on autopilot
League: ?
Champions: ?
CU: ?
Tarcanes92's guide to adding seats to your stadium
Tarcanes92's collection of Nordeus official articles that explain the game
I also agree with Mohamed Sultan,if you complete the 2 following tasks , you will reach what you want.good luck!
Edward FC currently on autopilot
League: ?
Champions: ?
Cup: ?
K Vegas FC currently on autopilot
League: ?
Champions: ?
CU: ?
Tarcanes92's guide to adding seats to your stadium
Tarcanes92's collection of Nordeus official articles that explain the game
Read what tarcanes92 says or dont. why bother accessing information on the subject from an experienced person who knows absolutely EVERYTHING about the subject if you want to remain ignorant about it?
Mohamed sultan, your numbers show on your screen as correct, there is no doubt of that, but as you choose each upgrade, the price of the future upgrades goes down and you will not see that until you compete each upgrade.
So just trust tarcanes92 because to do otherwise is just futile.