Russells specials misleading customers

I received a specials leaflet from one of the staff members at Russells Morena Mall and as I went through it I loved what I saw and checked at the back of it where it states that " Lay-by Terms: Up to 12 months interest-free, lay-by in not available on items of less than R500, Requirements - ID book/passport and minimum of R100 deposit". I then went to the store in order to laybuy a bed that was advertised for R3999 only to be told that special is only for cash and account holders and not for laybuy, I politely asked how come it is not stated on the leaflet and the manager told me that they were told to tell that to the customers and that t's&c's apply but when I asked for that specific clause on those t's&c's she was referring to she could not find it anywhere and even called another store manager who was put on loud speaker and that manager said that "there was another customer at our branch who was trying to be clever with me asking how come specials are not available on laybuy". That got me thinking so we as customers are wrong to enquire as we are referred to as "trying to be clever". I asked to be put on customer service line and they also could not provide just that clause that states that we are not allowed to laybuy items on special as it reverts to original price. I placed a laybuy for that bed and the price is now R4999 instead of the advertised R3999. I contacted customer care line and spoke to the guy by the name of Tshwanang who was very rude to me and told me that there is no furniture store that allows laybuy for items on special(which is not true) and it has been like that and he can't give me that clause also from their terms and conditions and when I asked to speak to his manager he said that their managers are never available for customers and he just dropped the phone while I was still talking to him. I find this misleading as I wouldn't have gone to that store if it wasn't for what I saw on their adverti*****t, and for them to say t's&c's apply whereas they themselves could not provide just a clause on those t's&c's to support their statement is somehow questionable and yet their management is not available to respond is something else too as I feel ****** by what they are doing because all I needed was just proof of what they are claiming so I can buy knowingly. I also asked yesterday on their Facebook page where it was advertised and up to so far my comments were not responded whereas other had responses.