合う => do something together N3
全く~ない => not at all ~ N3
全然~ない => (not) at all N4
~こと請け合い => I guarantee ... N1
Happens next
[合「あ」]う => To do A together/mutually N4
Secondary Verb
場合(は) => in the event of; in the case that ~ N4
~ににあわず (に似合わず ) => ~Different from N1
Evaluate
[全「まった」]く~ない => Not A (at all; even a little bit) N3
Not only, Not even