Husband telling the wife "It's over"

Q: On the 9th of December my husband told me its over over whatsapp but after that we slept together and told me he didn't mean what he said and then again he told me "I'm done" and again over whatsapp that was on the 3rd of January and then my mum asked him are you and my daughter finished now, so he said yes. Does this mean we are divorced or not?

Husband telling the wife "tala"

Q: I wish to mention that +-10 years ago my wife and myself had an argument  and during that argument she claims that I had verbally mentioned talaq 3 times to her. I did not mention that but said, tala tala tila. Both of us engaged with her family regarding this matter. They accepted and said we can carry on living together. During that time we had a baby girl who is currently 7 years of age, and my eldest then who is now 15. We worked together in building our family, invested in property and together furnished a new home. We also travelled abroad and shared family vacations together. Only until recently due to our current issues the talaaq matter came up for no reason. Kindly revert with feedback if the marriage is valid or not?