Hi there - I understand this is really confusing. Let me try to explain it:
Webfusion is the organization that you purchased two of your domains (servicedapartmentsmacclesfield.co.uk and serviced-apartments-macclesfield.com) from.
When you buy a domain, you "register" it for typically one year, during which time, no one else can use it. You have to renew it every year to keep it. So the company you buy it from is called your "registrar."
If you buy a domain from one company, and then you want to use it with a blog at WordPress.com, you pay us for "mapping" for the domain. "Mapping" is just the process that points your domain to your WordPress.com blog instead of to a holding page at Webfusion. It's a separate cost from what you pay Webfusion every year to keep your domain registered.
This is the case for two of your domains: servicedapartmentsmacclesfield.co.uk and serviced-apartments-macclesfield.com
However, your third domain, servicedapartmentsmacclesfield.com, you bought directly from us, so we are your registrar for that domain, not Webfusion. You pay us $18 per year for that domain's registration, and $13 per year for the "mapping" for the other two domains that aren't registered here. You probably also pay Webfusion a yearly fee for those two domains.
The emails you're getting indicate that at some point, you initiated a transfer of servicedapartmentsmacclesfield.com from us to Webfusion, so that they would be your registrar for that domain instead of us. If this wasn't you, maybe someone else that you work with on the site did this?
I checked on your domain on our end, and there's no pending transfer. I locked it just in case. These emails are not coming from us - I suggest you click the link provided in the email and deny the transfer, and that should stop the emails from coming.
If you do want to transfer that domain to Webfusion, let me know, and I'll be happy to help you with it.