Hi MoheeS,
Thank you for reaching Microsoft Community.
We understand your desire to replace your Surface Pro Signature Keyboard for a Surface Pro Type cover. About your concern, the return process is outside the scope of what we can support locally. To get more help with the return process, we advise getting in touch with our live support team. At this page Contact Microsoft Store Support - Microsoft Support, you can find the phone number for Microsoft Store support; simply choose your region to find the number for your country.
Wishing you all the best!
Kind regards,
Lavenia