RUDE EMPLOYEES YOU HAVE

I went to Hamley fourways today to go return the gift i bought for my son, i was told they cannot help me because the manager went out shopping and they do not know what time she will be back, all staff were very rude and just laughing at me, i waited over 40 minutes when the manager returned to the shop same attitude as well and told me she cannot give me a refund or voucher because the gift is opened, even though it was returned with its original box etc, eventually after my persistant she gave me a cash voucher,... i want nothing to do with this shop anymore, i want my money back i cannot be treated in this manner while i spend my own money - you really need to assess the type of employees you have, i really lost it today and i chose to never go to this shop - just give me my money and take back your cash refund voucher please.......