Excel Cell Not Showing Full Data

Hi, Thanks for checking my Thread.
In a particular CSV Excel file I want to populate "Description" column with a HTML template Code by merging 3 columns of HTML. The HTML has almost 20,000 characters. Now before merging and after merging when I copy paste the HTML in any cell it doesn't show all the code that I have copied. and when I merge all the 3 columns. a lot of HTML data seems to be missing. I think excel has some sort of limit and it is not allowing all these 20,000 characters merged and combined in 1 cell. I am stuck at this point and can't upload the CSV as the HTML is missing a lot of coding. Any solution please?
Thanks

Thanks so much Sambo Kid. Problem is solved now..

Thanks again