Warranty dept not responding to claims.

Warranty claim logged, 19928, ticket ***, and online Ref 19928. No response. I have a 16KG machine that had previously had its main board replaced after faulty. Now its making a horrible Clack/Squeel/Clunking sounds at the start of a wash cycle, sounds like its not engaging correctly, or slipping at times. I have registered a 4year warranty on this machine and have sent the technition whom had been here before a video of what its doing. It appears to wash fine for the first 1 minute then makes that sound clearly from the bottom motor area and this is deffenitely not normal. I bought my sister one of these machines aswell and hers has never made any of these noises before.