There are several good reasons why you should try and go for debt management services if you want to save yourself from being harassed by debt collectors who could get quite annoying to you. If you were to ignore your debt problems or you were to try and deal with your different creditors yourself, you would find that plenty of your time goes wasted on unnecessary stuff and sometimes your creditors could get quite aggressive to you and refuse any offers that you choose to make to them.
They know their stuff well so they employ these scare tactics to ensure that you would be doing your best to come up with the maximum amount to repay them as soon as possible. Now, some people may be okay with such a situation in which case they would get into mutual agreements with their creditors and honour their repayments till their loans are fully repaid.
However, others may not be able to deal with such situations because of the sensitivity of their cases. It is in the latter case that it would make more sense to try out debt management services who exist to serve you better. You should be initially assessing your own circumstances to decide upon the best option for yourself before going for a debt help where available.