Very poor communication, took over 2 weeks to send...

Very poor communication, took over 2 weeks to send out 2 plain trousers and a further 2 weeks for 2 tops for work. Need to return trousers and exchange for different size, Ive printed off returns label but it will not scan and saying invalid so unable to return. I've made this clear when emailing them but wasn't until the 5th email regarding returns that they addressed it to a degree by suggesting a collection rather than drop off point but lo and behold the label doesn't f###ing scan as I've repeatedly told them. This order was in place a month ago, I start my new job in 4 days with only half of my uniform. More worryingly this is the company the NHS use, avoid as there are many alternative companies that cannot be as useless as these clowns