Hidden additional costs.

Paid in full for roof extensions as per plans submitted to Manny's. Timber was delivered & fitted (eventually) but they conveniently forgot to take the wall "alterations" into account when quoting & designing new trusses. I asked for a full quote as per plan submitted to them - i got it. Work would only commenced when i paid in full - I paid. Now i must pay an additional fee for work that was quoted on initially but not done. Absolutely disgraceful ! I must also phone and chase up the contractors myself - as Manny's hands it over and forgets about it once they are paid. Do Not use Manny's for roofing requirements - it gets very expensive when paying for little extras they conveniently forget about !!