3.7</strong> The relevant stores are not responsible for the provision of maintenance and support with regard to the Mobile App. </li> <li> <strong>3.8</strong> All your claims regarding Premium Services subject to a charge, in particular but not conclusively regarding a warranty for defects or other defaults, must be asserted against us as your contracting partner and not against the stores. The provisions of these GTC apply. Regulations on the warranty rights and our scope of liability are detailed in <strong>Art.