I am apparently the victim of a monumental cock up! 
I am with a prepay company (against my wishes but had been very much given the impression it was all but impossible to switch from them)
Tonight I tried to do my regular weekly top up with them via the app and found I couldn't.
I've had a lot of problems with them and it's not uncommon for their top up services to crash so I thought that was what had happened.
As my meter level is lower than I like I called the emergency number as I couldn't get through to anyone on the regular contact numbers even though I called before 8pm when they close but they were very busy and I didn't get through to them and then the lines were closed.
I am very very anxious about this for health reasons, I cannot lose supply.
I eventually got through to someone on the emergency number.
It turns out that another energy company, without contacting me and certainly without my contacting them has taken over my supply.
My own energy company despite having 4 ways of contacting me (phone, text, email, post) ALSO did not inform me of this change although they are claiming they wrote to me I have not received any post from them in ages. Certainly nothing about this.
So I'm now in limbo with no idea what will happen now!
I'm worried about losing supply, I'm also worried about ending up charged twice (I'm on a very tight budget)
I'm hoping somebody who does this job or used to will be able to advise me on how to deal with this.
What questions to ask, what answers and response to expect and what is reasonable and not in terms of actions to rectify this.
Worried sick!!!
How can this be allowed that they can take over someone's supply with ZERO communication with them? Without so much as visiting the property?
I actually would like to switch provider to a credit one of long standing. But to be quite honest this and seeing many many others problems with even the major companies is really off putting.
They all seem to be hugely incompetent!