What is happening to my website???

https://www.cherry-pie.com.au/store

There are all of these errors coming up, is it because of the banner I tried to add, if it is why after deleting the banner is this still hanging around. My hosting company is upgrading their servers, is this what is causing it? I am stressed out because I have no idea how long it has been like this and I am expecting my Xmas orders to be rolling in soon. Any help is appreciated!

https://www.cherry-pie.com.au/store

Notice: This domain name expired on 09/10/07 and is pending renewal or deletion

weird
with the www. I get a page that has lost all formatting,
without the www. I get a domain expire page

Hmmm I don't get the domain expired warning which would be impossible because .au domains are 2 yearly and I got mine less than a year ago. I only get my page full of warnings

Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/cherrypi/public_html/store/includes/classes/bmz_image_handler.class.php on line 531

Warning: imagegif() [function.imagegif]: Unable to open '/home/cherrypi/public_html/store/bmz_cache/5/547f1307ce469cf93aa2b2fdbf779e61.image.100x70.gif' for writing in /home/cherrypi/public_html/store/includes/classes/bmz_image_handler.class.php on line 642

etc etc etc and the list of them goes on.

The only adjustment made to my site was the attempted addition of a banner for my sidebar but I deleted it thinking it may have caused the problem. I don't know if it caused the problem because I did not look at my site prior to this :frusty:

I am wondering the likelihood of this being a result of my hosts changing servers so I know if I should try to fix the problem god knows how or leave it because it may repair itself.

Sorry to double post. I found the problem, it is in the whats new sidebox thing so I have shut it off, is there a way to rectify the error somehow? TIA for any help, I really don't know what I am doing in regards to php or any web design for that matter.

ETA bugger!!!! it doesnt help the middle section argggg what do I do???