I've held premium bonds for years without winning and was wondering whether it is a worthwhile investment!

I've had 150 premium bonds since 1993 and have won one �50 prize!

Everytime I log on, my points total keeps changing. Yestarday I had 57,000 then 45,000 then back up to 59,000. Today I only have 49,000..... What is going on???
I have emailed Toluna but no response as yet and wondered if anyone else was having similar issues, or any ideas why it's happening?

Funnily enough yesterday when i logged on i thought i had less points than before but then i started doubting myself and so maybe it was wrong yesterday.

Ive just come back from a weeks holiday in a pontins,the list of complaints could be endless and have sent a letter of complaint already,have you had bad experiences with either or would you reccomend it to anyone else.