Leaking diapers and bad customer service

I bought a few packs of Huggies, and they are the correct size according to the kilograms, but every time I use Huggies nappies it leaks! ? I am extremely disappointed with Huggies. Not any other of the other nappies (like Pampers) I use leaks. I feel like I wasted my money and I am not sure what I should do with all the packs of Huggies I bought. I didn't keep the slip, didn't know I need to keep the slip due to buying faulty nappies. Also, they say they keep trying to phone me but I only have 1 missed call from them. I will not make a call on my expenses as I already had to buy a different brand diapers where I wasted money on 3 packs of Huggies