Lip discolouration from teeth whitening, what can I do? (Photos)

I purchased a blue light teeth whitening kit from Aldi. The first time it worked fine. A few weeks later I used it again and it broke while in my mouth so the gel went on my lips. Basically, it has caused all of my lips to go whitetish and there is a deep pink rim around my entire top lip. It also caused white patches on my lower lip where the lips have been burnt. I washed lips with cold water and used an antibiotic cream but the colour has never returned nor lips healed. What can I do?