Scottish Power

Has anyone else had issues with this company? We moved in to a flat with a prepayment metre that is supplied by Scottish Power, I'm not all that knowledgeable so I just signed up with SP for convenience and it's been nothing but a head ache. Being put on hold and bounced around departments for an hour before being "accidentally" disconnected, staff that don't really seem to have any solutions. I called up asking how I could swap to paying by direct debit and the agent I spoke to said I should have a smart metre installed so I agreed to that. Two months pass and the appointment finally comes around and the engineer that shows up says he's only come to fit gas and "someone else" will come to install the smart metre with no extra info. We told him it was supposed to be a smart metre being installed for gas and electricity and he called SP to confirm and even he was put on hold/left frustrated with no answers and now I've realised after looking at the app that they haven't even put my correct address in. I'm beyond frustrated, does anyone have any recommendations for energy companies that actually work?