Gums Black and Mouth full of sores

I am writing this because I have a complaint regarding the Vuse ePod2 Berry mix 3% pods.

I have been smoking the Vuse ePod 2 since the 25th of April 2023 when I stopped smoking cigarettes. The liquid started to taste weird, not at all a berry mix flavour. Some is leaking as well. I have noticed my gums started to go black and now my mouth is full of blisters. I have never had this problem before when I was smoking cigarettes. I am very upset with this product. I have wasted money on 2 Vuse ePod devices. Only to sit with a mouth full of sores. I can't go to work due to this as I work with people face to face on a daily basis and due to the Vuse ePod liquid that burnt my mouth I can't work.