Arena Carbon Pro Mk 2 Kneeskin Closed Back Sizing

Dear Forum members, FYI: This tread is mostly addressed to female swimmers with personal experience of ownership of Arena Carbon Pro suits, due the type of equipment, however valuable advices from male swimmers are also welcomed. I bought for my daughter's upcoming competition Arena Carbon Pro Mk. 2 for bunch of money. Her sizes are 164 cm height, 89 cm hips, 85 cm chest and 62 cm waist, the body length is 142 cm. We followed the size chart table and ordered a size 24. However it didn't fit at all. Then we've exchanged it for size 28 and it didn't fit again as she was even unable to pull it over her hip bones and we have noticed that if she continues to pull further the stretches were going to be ripped. We've returned the suit today and we need to exchange it for different size. Therefore based on your own experience and probable similarities, could you advice which size we should order?! Advices such as return the suit and get your money back and/or buy Speedo (I don't like the brand) are not suitable. Only practical advices to solve the size dilemma are welcomed. Thank you in advance! Ilian