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Welcome to JA.
I am sorry to hear about your situation.
Please note that this is not a chat service therefore you may experience delays but rest assured that I will respond within 24 hours.
You can surrender the tenancy agreement before the break clause. However the landlord will likely seek rent payment up until the breakclause date or end of the fixed term date. That said you can try to negotiate the asking price by perhaps offering your deposit or finding someone to replace you as a tenant in the property.
I hope I have clarified the position.
Thanks and stay safe.
If there is a written agreement with a fixed term end date that has not passed then the principle your friend is alluding too is not applicable in this case.
Unfortunately your agreement I not void due to non payment in the circumstances described.
The link below gives further guidance on how to terminate your contract earlier than the fixed term period