Towbar

Hi all, brand new to all this telescopey (!) thing. I’ve just purchased a used Celestron 130eq with motor drive. It all looks in excellent condition. I live on the coast and bought this more to replace my binoculars and view ships etc as use for Astro stuff. But... Using both supplied lenses my images are right way round but on the diagonal...🤬 ...what have I done and what can I do to remedy this..? The 130eq is sold as terrestrial and Astro- hence my purchase. Any help or suggestions would be greatly appreciated.👍 ‘signed an idiot🤔