Have 2012 Evoque that had minor oil leak. Took in and was told vacuum pump was cracked. Had it replaced and the next morning had oil pooling under the car. Took back in and am being told the rear main seal is leaking. $750 repair now looking at $2300 repair. Is it common for rear main seal to fail right after vacuum pump is replaced ? Is this due to uncertified technician? Or an upsell?