No electricity on Motorhome

PandaJan

Hello, I have a problem, went onto my motorhome yesterday I switched to Aux, no electricity, tried switching to Veh, again nothing at all. I then hooked the motorhome up to the electricity from my house and still nothing. Nothing was registering on the electricity
display, but the fridge would turn on, the heater came on using the electricity but there was no interior lights, the cooker wouldn't light because there was no electric ignition, the arial didn't turn on and I couldn't put the heater on using the gas as there
was no electric ignitition. It was just 'dead'.  I have no idea what is going on, can anyone advise me of what the problem could be please? Thank you