Hello there,
Hope you are doing well,
Do not panic, you can check in email inbox if you can find your registration number. If you get it then you can download it again from their website.
If you can't find your registration number then you can email them on this email id and tell them about your query, they might ask about your registered email id or your registered phone number or payment id number for reference.
Email id : convener.eamcet@tsche.ac.in (mailto:convener.eamcet@tsche.ac.in)
You can also contact them through their help desk number from their official website.
Hope I have solved your query
Drop your query for more information
All the best!!
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