Endless Clutch Issues please send help...

Hi, i have a 1986 110 with a 200 tdi engine. I brought it from a dealer and then found the clutch was slipping. New clutch kit in via dealer and 100 miles and clutch slipping again. Old clutch appeared half worn. New clutch clave cylinder as thought it was rusty and not returning fully. 100 miles and slipping again. Help.....
Should i replace hose from master to slave cylinder od look at master cylinder ???

No you should take it back and tell the dealer to get it sorted.

Bung a plug in the bell housing drain hole fer a few days an see if any oil drains out when you remove it, then tell the dealer to put a new crank seal in when he puts the new clutch in.