Debt busters suck

I have recently completed my debt review and till now I struggling to get my clearance certificate I have tried phoning I went on there web site nothing helps they say they will phone then the give miss calls and the send an sms saying they tried phoning me,I'm truly tired of this and iets like there doing me a favor there Customer service is very poor they don't have any professionalism and phone back or do a follow up I have been tried for weeks and they just don't give a ****