Panda sent me a letter showing the green bin with ...

Panda sent me a letter showing the green bin with plastic bags in it. Warned that I would have to pay for a contaminated bin. I called an pointed out that the bags in question were empty and made of recyclable materials. Still got the warning. Furthermore I wrote to Panda pointing out that they regularly leave the bin in the middle of the driveway. I happen to live on a very busy road. No apology and their staff cannot for some reason return the bin from where they got it. Avoid Panda if at all possible.