Property agent not disclosing critical damages on the house

On 26 October 2023 we put offer to purchase a house through HOLMZ under Zoe Ahlers as an agent. We viewed the house but some parts could not be viewed as there were stuff in the house, the study cupboards. on 02 March 2024 we received the key to our new home as i was doing inspection i realised that there were cracks in the study room inside the cupboards on the other side of the room. i then immediately informed Zoe who promised to sort it out at first she said it minor it needs polyfill until i requested the cancellation of the deal. She then promised to fix it but went quite. i was quite too as i was not well. i then contacted her and she told me she doesn't work for that company anymore. When i referred to Holmz (Oconnor) they gave me a run around until i contacted the old owner. They were disputing in fixing the cracks. i got the quote which was r12000 and they wanted to send their own contractor who came with the same mentality of polyfill. i then told the owner i am cancelling the sale as the house is sold under false information but the owner eame back with a document showing that he was aware of the cracks and HOlmz were aware of the cracks as he found them and told them about them. They previously acted like they knew nothing of the cracks until the old owner revealed the truth. Then Zoe send through his contractor who came did evaluation and peeled the wall outside thinking he is going to fix it. When Zoe came back with the quote was only to fix the one side of the wall which i rejected and she still does not want to fix the walls. Its a year later the wall still not fixed and i am not sure where to report the matter cause the cracks are growing by day. The house was sold to the previous owner by the same company Holmz they received double the fees with same damages.