Hi Pauline,
Several people could comment on MN, however this is a public forum, and if the posts are deemed libelous, then singing-pig could get closed down.
My post above refers to a thread which had several unsatisfied customers, which may have been deleted by singing-pig's admin. to prevent litigation. Flys in the face of freedom of speech, but thats just the way it is...
One thing you could do before agreeing to any service or parting with any money, is read the small print of the companies terms and condtions (T&C). If the company has breached the T&C, i.e. not delivered as stated, they could be taken to Small Claims Court under the Sale of Goods Act.
Note: Some T&C state they only have to deliver a certain %age within a given area!
If you read the posts on here, you may find that Royal Mail are reasonably reliable. As with most services, best to go on recommendation.
Good luck!
Sonny