Hair tangled in velcro at a soft play childrens centre

my 6 yr old went on a soft slide and the matt at the top had moved showing the velcro..my daughters hair was all tangled into the velcro and the owner had to go up and free my daughter who was hurt and very upset...should I complain about it or leave it ...my daughter was left upset and with a red mark on her neck and a sore neck

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