Complaints by the client that the speaker does not live up to expectations will only be accepted if the speaker does not fulfil criteria regarding correct dialectnative speaker or if the recording is quite unacceptable or unprofessional compared with the voice demo In such an instance a refund of the speaker fee may be appropriate

Could you correct the punctuation please?
Complaints by the client that the speaker does not live up to expectations will only be accepted if the speaker does not fulfil criteria regarding correct dialect/native speaker or if the recording is quite unacceptable or unprofessional compared with the voice demo. In such an instance, a refund of the speaker fee may be appropriate.