OK Petitebabe brace yourself - - - cut the lot right back to ground level. As long as it is Autumn Bliss then next years new growth will be producing fruit in the Autumn.
If it is a summer fruiting raspberry then you cut out the canes that fruited this year leaving the new canes to grow on.
Autumn Bliss is a superb variety & so easy to grow & prune as there is no guess work. Happy snipping.

Thanx bizzyb it's autumn bliss that i have. should i cut it back now or wait until february which is when i believe you shoud cut back autumn fruiting raspberrys?

some say prune now as it gives the new growth a boost as they have no competition but to be honest Feb is fine. I havent done anything to my A'Bliss as there is still fruit but it's swings & round-abouts, easier to tidy up in the Autumn as opposed to a Feb freeze. One thing is for sure you cant hurt them although it seems drastic ( actally it's quite good fun ). I have 3 varieties, early,mid & Autumn & without doubt A'Bliss is far superior in taste & a better plant to care for I think. Happy harvesting next year.

thanx bizzyb i will do it now as the plant is not fruting anyway as this is it's first year. I hope to get lots more fruit from it next year