Gujarat Technological University — I am complaining about my marksheets

I am a 2020 passed out student of GTU, zone Chandkheda, Ahmedabad and enrollment number:[protected], Patel Helly Pankajbhai and I have given my marksheets for name correction in december. I posted my original marksheets to them earlier and also sent tracking proof as attachment. The student portal got updated on 26th feb stating that marksheets have been recievd by the student, however, I haven't recievd anything. I called all the number available and yet no good response was recived by me. I had to delay my visa process and hence I am requesting you to tell me where are my marksheets and from where can i get it?
I am attaching you the proof that I have sent them my riginal marksheets