No, unfortunately you can't do it by yourself. Remember that a product page is shared between all the merchants whom put a listing on it, therefore you can't modify the attribute/title or description of an existing product.
But in case of a modification request: In order to ease the product modification process, whose responsibility is upon Catalog Team, the request should be addressed by filling up this form: https://forms.gle/MMeSPou9UtpTcxXL9
Catalog team will provide you a technical assistance concerning your request.
For CSV update you can send directly your update request to : firstname.lastname@example.org.
Please make sure to provide:
- Product name + Back Market ID
- SKU and Merchant name
- Details of the problem ( The wrong information and the update suggested )