We do not offer support for 3rd party modifications/distributions of RetroPie (As has been pointed out, RetroPie should not be included with commercial products, nor do we know the modifications that have taken place).
You will need to get support from the person/company who sold it to you - or alternatively download an official version of RetroPie from this site, and put it on an sdcard, and we will be able to try and help.
You also need to provide more details as mentioned - which may be clearer once you have installed RetroPie from the install instructions here which explain a lot of the system to you.