Index, Match in table

I have a table with the months from B1:M1 & Customers from A3:A35. B3:B35 are transaction numbers.

On another sheet, I have a cell, C2 with the name of the month that I type in, I've named it MONTH. I also have a seperate section for each customer that NBVC has helped me populate from another sheet based on MONTH and their actual transactions.

At the bottom of the section, I want it to populate from this other table based on the month in the MONTH cell.

I've created this formula, but it's not giving me the right information.

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You may have reversed the Row_Number and Column_Number arguments in the Index() formula.

Try:

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Does that fix it?