Newbie gardener here so forgive the potentially naive question.

I bought 15 raspberry canes - 5 each of three different varieties early
, mid and late fruiting.

These were planted into a prepared trench in late march this year and
cut down to 9-12" as instructed. Some sprouted new growth on the woody
stems, others sent up new shoots from below ground but about 5 seem to
be doing nothing (these are of mixed varieties).
1) Is this a reasonable survival rate?
2) Should I wait a full season then complain to the supplier - clearly
this is the wrong time of year for them to send replacements.
3)Do plant suppliers offer a warranty, or am I expecting too much?

Cheers

Bob