And in the mean time I have told the host to keep their money just remove the certificate.
I've had nothing but problems with Comodo certs installed by that host, and as now the one thing I was always attracted to was the corner-of-trust logo is gone (without warning too) there will not be any more Comodo certificates.
Any one can plonk in any old image and call it a "seal", which is all that I have available now (quoting hostforweb.com moments ago re what has replaced the corner logo), so I guess how long the corner logo lasts for byssl.net will be a wait and see (or not) scenario too.
D**n, now I have the Comodo anti virus to stare at every day on my PC when it keeps telling me my AV data is out of date. Oh well it will expire by the end of the year. I'm gone. Ooroo.