Windshield Wiper/washer Linkages Problems of Volkswagen Cabrio

On 4/21 I took my 2001 Cabrio in to be serviced at esserman in miami. They ordered the wiper fluid container because it was cracked and they couldn't repair it. I phoned every couple of weeks and they stated that they could not obtain a date from the nat'l parts center on when it would arrive and finally suggested that I phoned vw advocate. I phoned vw advocate 800-822-8987 on 6/1 and they were going to check to see when the part could ship to the dealer and phone me back. No calls received. On 6/7 I phoned again and the part is still on order with no projected date. I've had this car in several times for issues during the 3 years of my lease and now they can't tell me when they can have the container in so I can clean my windshield? I would at least expect a date to be given. I am in the mfg. Business and when an order is placed you give a delivery date -even if it has to be produced. I don't know where else to turn to get an answer and would appreciate any help. My lease expires next April and I would like to replace the part prior to then and I'm tired of going to gas stations to clean my windshield.

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