Poor poduct and bad service

We have purchased huggies nappies for our baby from birth, a few months ago we had problems with the nappies breaking while the child was wearing those nappies, that was the first time this problem happened in the 6 to 8 months we used huggies. We contacted huggies and complained to them about the product and explained the inconvenience and damage which took place due to there product defect, babies blankets and bedding and matress all was messed at some point due to the nappies breaking off. They had sent couriers to pick up samples of the defective nappies and said they will go for testing, and we will get vouchers in the mail for nppies. They had only offered us 1 pck of nappies and the pack we purchased which makes it 2 pcks for the damages we hd to face. We accepted as we did not have bad intentions or didn't want to be difficult, but then the problem cme about when they promised us the nappies on a specific date which didn't happen, then promised another date and yet again it didn't come and now for the third time we where promised again and still waiting. From the time we where promised the nappies and now it's gone almost 3 months I would say, so if my kid was using nappies then and now he is a year old I'm using pull ups for him does it make sense. On the last call to them we tried to bring up now the damages we had due to there defective product and that due to them making us wait that 2 packs of nappies won't really do, as I said of the 2 packs 1 is our puchased defective replacement. The guy was very rude to my wife telling her to get straight to the point when she tried to explain to him or unhappiness due to there poor service. He said that vouchers are with the courier for 2 packs of nappies for us and have been with them since December, that was his excuse on the last call that it will reach us 3 to 7 days time. That time had once gain lapsed and nothing received.