Samsung ecobubble front loader won't drain and gets stuck on cycle

[NC00PZ]

My Samsung Series 5 ecobubble WD80TA046BE/EU 8 kg Washer Dryer has stopped draining.

Suspect initial problem came from a heavy load and a debris blockage.

Have cleared the debris filter, checked the drain hose (emptied some stagnant water and blew through the attachment part, needed an extension as hose was too short) and recalibrated the machine.

The machine now gets stuck continuously moving water in the drum at 10mins of a 15min (empty) cycle.  When emptying manually it will then restart but tbe same problem occurs. Any ideas on next steps?

Thanks in advance.