I've raised £4000 to Get me to Tanzania to help the more unfortunate people and children by helping with things such as building houses/classrooms

Hello,
In the year of 2019, there is a group going to Tanzania with school. The overall price of this being £4190. Firstly, this trip is in no way, shape or form a holiday. Instead, we will be going to Tanzania to do what is essentially work for the unfortunate, poorer people who are not as well of at we are here in the UK. These people are essentially living off of 60p a day (for their whole family!) and have to walk ages and ages to get clean drinking water, something that we take for advantage in the UK. This is why the average life expectancy is only 55 years old in Tanzania. During my time in Tanzania I will be helping to build school, educate children, help to build water supplies, houses and many more. One example of this being a group in 2016 who built a mud hut for an elderly lady who could not physically be able to re build her house (which had fallen down). Once they had completed this, they bought her a mattress with their own money. She was the only person in her village with a mattress. This just proves how much these trips benefit the people of Africa.
This would be an amazing, once in a lifetime experience, but to be involved in this I desperately need your help! I need to fund raise £4190 and £400 of this cost needs to be fund-raised in the first week
I am not asking for you to pay the whole amount. A few pounds could be the difference between me staying in the UK in 2019 or going to help the unfortunate people of Tanzania. If there is anything you could donate, I would be hugely grateful - Jazmin