The reason for Visa Refusal is that the information submitted regarding the justification for the purpose and conditions of the intended stay was not reliable
I also emailed a consulate about it and their reply was as follows:
Dear Sir / Madam,
After a visa application is rejected, the applicant him-/herself can lodge an appeal against the Consulate´s decision. The appeal letter can be sent by original letter, by fax or as a scanned e-mail attachment. It has to contain the applicant's signature. It is also possible to authorize another person with the appeal process. This should also be done in writing. The letter should state the reasons why you want to appeal. If there are any more documents supporting the purpose of the applicant´s stay in Germany, you should also submit them and they will be taken into consideration by the officer. The appeal process might take a while, but you will usually get a response from the Consulate within 4-12 weeks' time. You also have the chance to re-apply. A special appointment for the submission of the new application cannot be granted.
I want to the appeal it what should I write and what all more documents need to Submit it I am going there for sports purpose.