Funds for deposit to secure mortgage for home

I am a mother with daughter aged 10. We were abandoned by my ex-husband in 2023 since we refused to join his family in another country and be his slaves. I applied for a divorce after he left. To make me surrender to his orders, he threatened me to leave the house, else he won't pay mortgage. I refused to leave. He left us to his family, deprived us of food, emotionally abused us and the dog(he would shut the door on dog and dog would sit outside waiting for him, scratching on the door) to the extent that with a heavy heart, I had to give away our family dog. He now wants to sell the house and make us homeless. Since 2023, I struggled to earn enough to pay monthly mortgage. I borrowed initially from friends and then started working all 7 days 7:30am until 10pm to earn enough to pay for household expenses. I am now at a stage where I was able to earn as much to prove my eligibility to take up this mortgage. However I don't have enough savings to pay for this upfront deposit. As a part of divorce, I need to show the court my affordability to save our family home which is currently mortgaged jointly with ex-husband. I am not eligible for universal credit. The current mortgage is £125000 and my mortgage affordability has been calculated at £110000. This means that I need to pay£15000 upfront to the bank to secure the mortgage and save our family home.  I appreciate every little help that you can to save my house for me and daughter. I already lost my dog, I can't afford to lose anything else in my life.