When you wrong someone, the consequences you will face in life will reach far beyond that particular situation. You will feel the effects of that dhulm (oppression) in multiple ways. It will lead to a decrease in the Baraka (blessings) of everything you do in life. I have seen many with great careers wrong their family members and lose everything.
Similarly, on the day of judgement your transgressions will haunt you with ALL of your good deeds as Allah will cause them all to be nullified, even if they were done perfectly, until that transgression is accounted for.
Purify your tongue, hands, and everything else from wronging others. For Allah does not love the oppressor.
May Allah protect us all from wronging others or being wronged by others. ameen