Bangalore University — Need refund

I need convocation certificate for the job. On 7 may i went to my college AIMS INSTITUTE to ask my convocation certificate but the college said it didn't came yet, the college told me to go and issue PROVISIONAL DEGREE CERTIFICATE (PDC) from Bangalore University. Then i went to Bangalore University to inquire about my degree certificate they also told me not came yet you need to wait. Then I applied for PDC on 24 may 2022 and i paid ₹ 1050 to get my PDC. The University told me to come after 15 days and collect your PDC, then after 15 days on 8 June 2022 when i went to Bangalore University to receive my PDC, At first i went to counter no. 9 they told me to go and ask on counter no. 2 then i went to counter no. 2 they search something in their computer and again told me to go to counter no. 9 then when i went there the person who is incharge there told me that your convocation certificate already sended to your college after 29 April 2022, I told that person who is incharge there i need my refund back which i gave for PDC he told me you won't get your refund then he told me you have to inquire before applying for PDC, I told him after inquiring everywhere then only i can and apply for PDC and now you are saying that no need to take PDC go to college and take your convocation, then i asked him why didn't you told me when i came here to inquire about my convocation certificate, that time you told me that i have to apply for PDC. After i paid ₹1050 for my PDC and waited for 15 days then you are telling me that your convocation is already sended and you won't get your refund also.
At last i am raising this complaint because I need my refund back which i paid for PDC.