I bought twin pack of their body make up lace - It is tearing off on the elastic waistband

<p>I bought a twi pack of their "body make up lace"  panties and bras in Cape Town. The elastic waistaband has a seam like "briefs" and is ripping off or tearing off, i found that i had thread hanging the other days and it keeps on running. I bought this less that a month ago and i hand washed it. It looks great but the quality is very poor. I would like to know what do i do now? As i cannot continue wearing it, in no time; it will not have a waitline left. Very diappointed, as i loved the colours, wanted something colourful.</p>