Bad quality of the bed

What a bad experience I have received, I baught a double bed of R4000.00 last year around August ,but in December we notice the bed is already making noise and you can feel the springs on the bed,I went to the store to complain in December and they have been running around until today, Iast time I spoke to them was 3 weeks ago they told me that they received a permission to give me new bed,but to date I did not receive the bed.