My electricity provider has absolutely no trust from me after a number of experiences which I won’t describe here. I certainly wouldn’t be surprised to find they’ve overcharged me. The process to deal with them in any regard is always byzantine. So, I suppose it depends on what you mean by “have to.”
I find it odd that anyone would give permission to a third party (any third party) to at will withdraw money directly from your bank account (and if I'm understanding correctly how it works in the US without even being able to set limits on it, neither in frequency nor amount).