Don't do this.
It is a terrible idea.
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Free services have negative interest in protecting user's privacy, they would mine the shit out of that data.
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Since you are doing this from a company network and split tunneling is not 100% secure, this means that your company computer will send internal communications through the VPN, where it will be mined the shit out of.
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Since you are talking about torrenting, even if you are just consuming small ammounts of data, don't be surprised if the VPN provider eill either block you immediately, or hand over suspicious logs to the police/media companies.
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You claim to have permission to do this, I am pressing X to doubt, if you had proper permission to do this you would not need to use a free VPN, the company would either have the technical and legal infrastructure to deal with this, or they would provide you with a good paid VPN like Mullvad.
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This sounds extremely sketchy to me, and unless I have a written and signed order to do this in this manner I would refuse to do this work, and even then I would want a written and signed order for the specific time I had to do it.