Parkdean Resorts complaint: CHILD FOUND DRUGS IN CARAVAN ON ARRIVAL

on the 16th of April 2021 we arrived at lower Hyde holiday park with our 3 children 1, 5 and 6 years of age.
we arrived just after 4pm to no 38, Osbourne grove
our welcome pack and key was on the table inside as stated in a email prior to us arriving. we started unpacking the car during this time we noticed our 5 year old was walking out from one of the back rooms in the caravan holding a open clear bag of drugs (cannabis) and a packet of rizla’s, i shouted and screamed in horror at him, i asked where he got it from and did he eat any, he was crying as he thought he was in trouble. i then took the drugs to reception and filled out a incident form on the 16th april 2021 at around 4:35pm.
I suffer with anxiety and depression and am currently with my doctors on this matter (doctors note can be provided) this was our first holiday in a long time and it was absolutely ruined. the staff moved us to another caravan and said it would be checked before i entered. I then went in to check for myself and founds other items under beds etc.
i had to keep checking over and over again incase i missed anything, we didn’t let the children play alone in any of the rooms or outside unattended. the next day the alarm kept going off and i was afraid it was the monoxide alarms so i contacted the security team on the 17th April 2021 at 8:34pm. the security checked the alarms had power and i was told to keep an eye on these and to contact them if i needed.
our holiday was ruined right from the start.
i have contacting you first regarding this issue.