Walking. If you're getting so frustrated and angry that you can't concentrate, then go for a walk.
Though personally I feel these emotions are very "strong", and really shouldn't be found in the workplace. If you frequently find yourself feeling angry or frustrated at work, then you may have to consider some emotional training.
For further actions, you may consider blocking this person and/or reporting abuse
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Walking. If you're getting so frustrated and angry that you can't concentrate, then go for a walk.
Though personally I feel these emotions are very "strong", and really shouldn't be found in the workplace. If you frequently find yourself feeling angry or frustrated at work, then you may have to consider some emotional training.