I'd take it as a sign of things to come and move on unless DD was very talented at whatever it is or really loves it and it's the only option. We had similar scenarios at various places DD has been a member of and the only regret I have is of not moving her on sooner as their demands increased.
DD went to a performing arts after school place like this starting at 18 months - 8 years. When the school first started the only compulsory items were a t-shirt and the correct shoes for the class you were taking. Then it changed to one type of leotard which was used for all dance classes, fair enough. As the school became more successful it soon became that every class had to wear different things, different colour hair bows, different colour and type of leotard for different classes and ages, different tracksuits for everyday and another for competing, another set of clothes for exams and shows etc. Things were forever being lost as they had to get changed in the toilets / changing room. The entire culture of the group was stressful for parents and children but you feel like you've invested so continue, fortunately DD decided it wasn't for her anymore so we left.
DD left there and started competitive swimming, team tracksuits were available if you wanted but the only compulsory item of clothing was a t-shirt and they all had to have swim hats, fins, pull buoys etc but they lasted years.
DD left there and started at girls rugby, the only compulsory items are for safety, rugby boots and gum shields, the club encourages the use of hand me downs and has a 2nd hand shop with all proceeds going to the club. Playing tshirts are free (paid for by sponsors) you get your top at the beginning g of the season and keep it handing it back at the end. Training gear, socks, tops, tracksuits etc are all available but totally optional. Of all DDs extra curricular this is the least stressful to be a part of its an incredibly well run club with an adult, youths and mini section and all the staff/volunteers are laid back and seem in it for the sport more than anything else.
DD also does a recreational tennis group and all she needs is a racquet.
Really think about the group and the organiser and look at the parents at participants that have been there longer, are they happy? It may have been poor communication and the person that ordered your equipment didn't know that the uniform was changing. Or is it one thing after another? Often the people in the 'inner circle' are happy as it gets their child picked for the best position etc but those in the periphery aren't.