Wrong size of a bed

I bought a bed back in March buy we were busy with renovations so I requested the store to keep it for. So when we were ready to recieved the bed we called and they told us we had to wait 6 weeks to get the bed which was gonna be end of July. So I contacted the store to find out if they were ready to deliver but the order wasn't filled up I got a very nice lady by the na.lme of refilwe who assist with making sure the bad was deliver after I was send from pillar to post. Fast forward I got the bed on the 18th of August. The need needed a mattress as it was a dual bed I took time to assemble as I didn't have the mattress and I was out of time so my nephew was at the house when the mattress was delivered she assembled the bed. As I come back home I realised that they gave a single bed base now the mattress is hanging over the bed I am so upset infact annoyed that they took ages to sort out my delivery now they delivered the wrong product....