Hello,
During the KEA counselling there is a provision for document uploading and that is done as per a schedule that the KEA has released in which candidates within a specific rank range will be allotted different dates for uploading the documents. As you have mentioned the concerned authorities had asked you to mail the documents so you need to confirm with them if that document that you mail will be considered. If they confirm this then you needn't worry about that.
Hope this helps you.
As you already contacted the KEA help line center regrading this problem and got a response to send the document through mail, maybe they will definitely consider your document for the procedure. Maybe should again call the KEA help line center and follow up the details. So that they can be updated about your problem.
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