You have been refused for a fiance visa, we don't know why. You now want to apply for a Tier 2 Inter-company Transfer (T2 ICT). And your question is...
What should I do?
A T2 ICT is laid out such that you are actually a minor player. The host company does all of the heavy lifting by getting their license and then by issuing a Certificate of Sponsorship (COS). This makes them stakeholders in the outcome because a refusal will get logged against their license and make it more difficult to renew it. Moreover they will have to find a replacement for the work you would be doing.
Your immediate role is to get the refusal letter for your fiance visa and send it to the host company so that they make an informed judgement before issuing the COS. Not doing this would be unprofessional and likely get them upset.
If they decide to proceed with the COS, then it's down to you to make the application and follow through on it.
Normally UKVI eschews issuing a temporary visa when the applicant has previously failed on a settlement visa because they can suspect a secondary agenda (i.e., settlement) make appear once you arrive in the UK. But if the host company knows about it and they are willing to proceed, you do not have a lot to lose except a refusal on the PBS side to accompany your refusal on the family formation side. We don't know enough about your personal circumstances to help you make that decision.
So the best practices advice is to send your refusal letter and if they still want to proceed, then ask them to instruct a solicitor on your behalf.