Lewis dining room suite table - bad service!

I hope someone can assist me. I bought a dinning room suite at Lewis protea glen a month ago. I paid cash for the furniture, a day after they delivered i notice that the table was not straight i tried calling the store but no answer for about 2days till I called the customer care line which they logged a query for me they got an assembler to come have a look and he confirmed that the table is not straight. Lewis replaced the table when we looked at it after they replaced it looked fine until about a day later when we realized that they same problem is there it is not straight the sides are weighing down. I have went to the branch and was told the design is like that from the manufacturer but when I saw the table before buying it it was flat straight. I told them I want a refund because this is not what I was buying, the manager then said no actually there are 2 designs to that table they will check a straight one for me AGAIN they will let me know. The problem is i raised this table issue before why was i not given a straight table if there was another design. I feel iam being treated like this because I am a woman, this is really not fair. I paid R9000 cash for this dinning room suite yet i get a falling table.

I can't have a falling table in my house that i only bought a month ago CASH, i actually want a refund as i was sold something totally different from what I saw. Can you please assist me.