disappointed with my purchase 9

Article corresponds to our expectations but big disappointments for the quality of material.
Tray arrived broken and missing of the fixing screws for the fork and the stand.
Finally, thank you you made me replace the defective material.
Unfortunately, to my surprise, within 10 days to track my purchase, a 2 tires to burst? ? ?
While we had a nice sun with 23 degrees temperature, but we did not even have yet used this trailer! ! !
Now I am in search of the tube and it is not easy because it is a special dimension.
Question: Is it normal that the tubes explode in the sun? ?
What do you offer! ! !