No Customer service and blamed for their faulty device

Very disappointment at the lack of customer service from this company. About three months ago I experienced issues with the P30 lite phone. Due to the covid i could not take it. Finally i managed to take it to their service center in Melrose Arch, a rep told me because the issue is the mother board and they don't it i should come back after two weeks. I went back, another rep told be definitely it is the motherboard, it is common with this model, he even asks me why did i buy it. Nonetheless he gives me options to get is sorted, which i opted for collect and deliver - he said i will not be charged pick and repairs as my phone is under warrant (it is less than 6months afterall), and it is the motherboard issue. I logged a call and it took them two weeks to collect. twelve days later there is no communication from anyone, when i follow up they send me a quotation advising that the phone will not be repaired until the amount is paid. This is 12 days later and no one bothered to contact me to advise the status of my phone or even explain why i suddenly need to pay for repairs. Again i had to follow up, I they tell me my phone has water damage. I have no idea from when and how. also how come the repair center in Melrose Arch could not pick that up? am really disgusted at the way i have been treated. If i could I'd just let Huawei keep their phone but its on contract and it is very new. Huawei has caused me so much stress, hurt and not they want to financially rob me.