Poor service at cashbuild Tsakane mall

I bought items which required transportation at Cashbuild. I asked if I could pay and leave the items while I try to find transport & was told its fine I can pay & collect later as long as I have my slip as proof of purchase. A few days later I go to fetch my items but am told I can't have them because Ieft them for more than overnight store policy doesn't allow that. I told the lady that was not explained to me when I asked if I could leave them. They admit that the items are still there but I must talk to the manager, but the manager went out. I waited more than 30 minutes for the manager to return. I asked to be assisted by assistant manager instead seeing that the manager hasn't come back to the shop & the bakkie I hired had another trip to make. I was told that assistant manager can't help me. I waited a further 15 minutes for the manager to return, still in vain. I am pregnant & I can't be on my feet for long. I then told them am going & will be back tomorrow morning. I had to pay for the bakkie even though I didn't get my items. On top of that I still need to pay again to get my items tomorrow if I find the store manager & she agrees to release my items. I was told am worsening the situation by leaving. But how do I wait for somebody nobody knows where she went & nobody knows when she will be back? I was told to leave the slip behind. I refused sighting that I won't have any proof of payment. The 1 guy said he won't be able to help me if I don't leave my slip. When I was about to take a picture of the slip with my cellphone then was told I would be given a copy of the slip