Hive heating payments

Hi,

I have a bit on an issue with Hive Heating.

I took out a plan with them in September 2018, the plan was for 10.75 per month for 12 months.

Today, I got an email off them to say I had an outstanding payment of 96 pounds.

As far as I knew, I'd been paying every month (I rarely check my bank account).

My services have never been interrupted because of this, and I called them to ask what was going on, in case this was a scam email.

The operator said I did indeed owe 96 pounds. So I asked why am I only just being contacted about this a year later? He was unable to answer this. He has since escalated this to the payment team who will allegedly call me back on Monday.

When he asked if I wanted to make a payment, I said I could pat half now, he refused to do this and said he could only take it in full.

My question is, if they can only take it in full, can I refuse this, as technically this is their fault. If they had contacted me a year ago to say there was a problem, I could have sorted this out there and then. Why wait a year to tell me there's a problem.

It seems they've only just found out themselves and are trying to backtrack. He asked me to check the spam folder of my emails to make sure none from 2018 had gone out then, low and bhold there wasn't any.

Thanks for any help